Size-This product will fit inside of 1-1/4" Size PVC fittings, which have an inside diameter of 1.660" (1-5/8").(Not compatible with PVC pipe. For caster attachment with PVC pipe, use our 1-1/4" Caster Pipe Cap)
Installation-For 7/16" Grip-Ring Stem Casters, simply push the caster into the hole on the bottom of the Insert. For 7/16" or smaller threaded caster stems, insert the caster stem into the hole and secure on the opposite end using a nut and washer (if required). Then insert the Caster Fitting Insert (and newly attached caster) into the PVC fitting at the bottom of your PVC project to complete the attachments of wheels.
✔ Works Great for office Chair : ANPTGHT Office Chair Wheels With Brakes are designed with the universal standard size stem, the screw size is 7/16" X 7/8", (11mm*22mm), suitable for 99% office chairs brands of Miller Steelcase, Aeron, Herman, Dxracer, Humanscale Freedom, Lazyboy Serta, Hon, Boss, etc. IMPORTANT: Not for IKEA chairs.
▲ Heavy Duty Construction :To avoid slips and increase friction, our chair caster wheels adopt roller skates technology and passed the top-level test of BIFMA and ROHS. The chair casters built with sturdy steel structure with premium dual-steel ball bearings and PU rim could strong enough to load up 650 lbs by a set of desk chair wheels.
✉Smooth & quiet: Fast and quiet office chair wheel-rolling on any surface without any squeak. With these large office chair casters, you're able to roll effortless and change the chair's direction of movement easily.