Our dual wheel stemless casters are designed and made in the USA out of quality materials. We offer the option of hard wheel casters for easily rolling on carpeted surfaces and a soft wheel caster for safe rolling on hard surfaces. The oversized 33mm diameter neck creates the illusion of the caster and chair being one unit. The 2-3/16″ diameter, dual wheels accept stems with dimensions of 3/8″ diameter up to 1-15/16″ in length. Our casters come in sets of 4 or 5.