Master Caster Bell Glide, 5-1/16 by 1-1/2-Inch, Black 2-5/16" height maintains chair height when used to replace casters Large 2-3/16" base diameter provides stability High Profile Bell Glides convert any office chair with casters to a stationary chair 2-5/16-inch height maintains chair height when used to replace casters Large 2-3/16" base diameter provides stability High Profile Bell Glides convert any office chair with casters to a stationary chair 2-5/16" height maintains chair height when used to replace casters High Profile Bell Glides convert any office chair with casters to a stationary chair