Glide through your day. Set of 2" nylon glides. Alternative product when casters are not desirable. Set of 5. The stem is.44 diameter by.875 of an inch in length, not including the stop at the base and 1 inch in length overall. Optional Glides for use with Apprentice II Chair Models 7083BL, 7084BL, Trenton Chair Model 3420, Precision Chair Models 3401, 3380BL, 3390BL and Office Stool Model 5100 and Task Master Chair Models 5117 and 5120 (sold separately). Easy installation.