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Office Chair Caster Stem Glide Foot
Fixed glide foot that drops into an office chair base in place of a rolling caster, for the standard 7/16 in x 7/8 in (11 x 22 mm) grip-ring stem socket; the 10.2 mm stem carries four crush ribs to 11.4 mm so it presses tight into 11.0–11.3 mm sockets (not 10 mm Euro stems). The 50 mm diameter, 14 mm tall pocketed foot has a flat bottom for a stick-on felt pad and a 36 mm overall height; print five to stop a chair rolling on hard floors.
Office Chair Tilt Tension Knob Retrofit
A 66 mm scalloped replacement for the cracked tilt-tension knob under an office chair. It is 28 mm tall with a 12.5 mm through-bore and three radial M4 set screws in brass heat-set inserts, so it clamps onto the old threaded stem or a stub of rod anywhere from about 8 to 12 mm. You don't need to know the chair's exact thread.
Office Chair Caster Socket Repair Sleeve
This sleeve repairs a cracked caster socket on an office chair base. Drill the split socket out to 16 mm (5/8 in), then epoxy the sleeve in place. The 11.2 mm bore takes the common 11 x 22 mm grip-ring caster stem, and the 28 mm tube is longer than that stem. A 32 mm washer flange spreads the load across the underside of the leg. Three V-grooves hold the epoxy.
Office Chair Caster Parking Cup
This is an 80 mm dished floor cup that stops an office chair caster from rolling. It holds single or twin-wheel casters from 50 to 65 mm across and up to 26 mm wide in a 9 mm-deep bowl, so the chair stays put on hard floors at a desk or standing desk and the floor doesn't get scuffed. The body is 12 mm tall, the floor is 3 mm thick, and the rim is flat and sloped so a wheel rolls in with a nudge but won't roll out by itself.
Office Chair Height Lever Paddle
A replacement seat-height lever paddle for an office chair whose plastic paddle snapped off the metal actuator tab — 119 mm long overall with a 95 mm reach, 28 mm wide, ribbed top and an upturned finger lip at the tip. The clamp head takes a 16 x 8 mm through-slot (fits a flat lever tab up to 15 x 7 mm, or round stock up to 7 mm) and locks onto it with two M4 screws in 5.5 mm heat-set insert bores, pressing the tab down onto two ridged floor rails.
Office Chair Armrest Riser Spacer
A 20 mm ribbed spacer that sits between an office chair's armrest bracket and its pad to raise the armrest for taller users or a too-low chair. Footprint is 92 x 54 mm with a 7 mm wide, 74 mm long slot through both faces, so it takes M5, M6 or #10-24 chair screws at any spacing up to 67 mm apart — measure your pad screws first and buy screws 20 mm longer than stock. Hollow rib grid inside, flat contact faces both sides, stack two for 40 mm.
Office Chair Gas Lift Stop Collar
A snap-on split collar that stops a sinking office chair: it clips around the exposed chrome gas-lift piston rod (fits rods up to 30 mm through a 27 mm funnelled throat) and bears the seat's weight in pure compression on the cylinder or cover rim. 54 mm OD, 30.3 mm tall for ~28 mm of lift per collar, with a cone-in-cone spigot so two or three stack to set any height, and a 4 x 2 mm groove around the outside for a zip tie so it can't drop off. Replaces the split-PVC-pipe hack; no need to pull the seat off the chair.