The 4000GL replacement glides can be used to replace any worn glides on Richardson Seating's retro diner chair 4100 and 4200 series. Replacing any worn glides is the most affordable and quickest way to restore or extend your current diner chair life cycle. These glides are sold individually. $4.00 is the price for one glide. Please order a minimum or 8 glides. The glides are meant to fit one inch metal tubing. Our diner chairs use 14 gauge tubing, but these should work with thinner gauge as well. Please contact us for more details.