Traditional anti-friction bearing, best for manual applications where shock loading (but no side thrust) is prevalent.
Neoprene is a special formula of rubber that provides far better chemical and oil resistance than standard rubber. These wheels also have a hardness of 70 Durometer (+-5, Shore A) and come standard with roller bearings. Although they are not listed on the caster pages, all of these wheels are available in many of our caster series. Consult factory for pricing and availability.