{"product_id":"f1-pro-task-chair-automatic-weight-sensing-synchronous-chair","title":"F1 Pro Task Chair","description":"\u003ch3\u003eOverview\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eThe F1 chassis with a mechanism that sets itself\u003c\/strong\u003e – F1 Pro replaces the manual tension handle with \u003cstrong\u003eautomatic weight tension adjustment\u003c\/strong\u003e. The mechanism adapts to your sitting position through your body weight and the pressure you place on the backrest, so the recline resistance is right without anyone having to set it.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy that matters in practice\u003c\/strong\u003e – Most task chairs are delivered on a factory tension setting and never adjusted, which leaves lighter users fighting the backrest and heavier users unsupported. An automatic mechanism removes that failure mode entirely. Upholstery is applied adhesive-free, and the base runs load-controlled braked twin castors.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Highlights:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eAutomatic weight tension adjustment\u003c\/strong\u003e — no manual dial to set\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003ePoint-synchromatic mechanism\u003c\/strong\u003e with free-flow recline and four-position lock\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003e70 mm sliding seat depth adjustment\u003c\/strong\u003e — standard\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eAdhesive-free upholstery\u003c\/strong\u003e, fully recyclable and breathable\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eManufactured in accordance with EN 1335\u003c\/strong\u003e, plus Blauer Engel and BIFMA LEVEL 3\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eLoad-controlled braked twin castors\u003c\/strong\u003e — the chair stays where you leave it\u003c\/p\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eErgonomics\u003c\/h3\u003e\n\u003cp\u003eThe seat travels 400–530 mm in height and slides through 70 mm of depth as standard, and the point-synchromatic mechanism reads your body weight to set its own recline tension. The full set of adjustments:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003ePneumatic seat height adjustment:\u003c\/strong\u003e 400–530 mm\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eAutomatic torsion control:\u003c\/strong\u003e recline resistance is set by your body weight\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eSliding seat depth:\u003c\/strong\u003e 70 mm\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eFour-position tilt lock\u003c\/strong\u003e\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eLumbar support:\u003c\/strong\u003e optional — 4-way on mesh builds\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eHeadrest:\u003c\/strong\u003e optional on 61 cm upholstered and mesh builds\u003c\/p\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eSpecs \u0026amp; Delivery\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eTechnical Specifications\u003c\/strong\u003e\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth style=\"text-align: left;\"\u003eFeature\u003c\/th\u003e\n\u003cth style=\"text-align: left;\"\u003eSpecification\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaximum user weight\u003c\/td\u003e\n\u003ctd\u003e110 kg (GS certified) on the Standard and Dynamic seat tilt specifications. 150 kg on the \"Standard — 150 kg rated\" and \"Dynamic seat tilt — 150 kg rated\" specifications: a reinforced build certified to 150 kg, which comes with the 4D multifunctional armrests and the 150 kg-rated five-star base the certification requires\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeat height range\u003c\/td\u003e\n\u003ctd\u003e400–530 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeat width\u003c\/td\u003e\n\u003ctd\u003e480 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSeat depth range\u003c\/td\u003e\n\u003ctd\u003e400–470 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackrest height\u003c\/td\u003e\n\u003ctd\u003e530 mm or 610 mm upholstered; 580 mm mesh (fixed height)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBase diameter\u003c\/td\u003e\n\u003ctd\u003e680 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eChair weight\u003c\/td\u003e\n\u003ctd\u003e16–17 kg upholstered; 14 kg mesh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMechanism\u003c\/td\u003e\n\u003ctd\u003ePoint-synchromatic with automatic weight tension adjustment\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCertifications\u003c\/td\u003e\n\u003ctd\u003eManufactured in accordance with EN 1335; Blauer Engel, BIFMA LEVEL 3, GS certificate, pollutant tested, ergonomics tested\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eAssembly\u003c\/td\u003e\n\u003ctd\u003eDelivered fully assembled — no build required\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e\u003cstrong\u003eDelivery, returns \u0026amp; what's included\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eFree tracked UK delivery\u003c\/strong\u003e — made to order, approximately 4–5 weeks. Lead time varies with specification, so we confirm your exact date when you order.\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003eDelivered fully assembled\u003c\/strong\u003e — ready to use the moment it arrives; no build required.\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003e14-Day Hassle-Free Returns\u003c\/strong\u003e if the chair isn't the right fit (see full policy for details).\u003c\/p\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cp\u003e\u003cstrong\u003e5-year warranty\u003c\/strong\u003e on the chair; 2 years on the gas lift. 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