... heavy-duty caster series, super-heavy caster series, single caster series(rubber caster,inflatable caster,forklift caster, high temperature phenolic caster, polyurethane caster, nylon ... type, flexible type, screw type,brake type.Nylon wheel, Economical, good choice for money consideration1. ... This wheel type is Nylon wheel with ball bearings.2.Standard: ISO9001/ISO140013 ...