... .Diameter:75~125mm 2.Load capacity:70~90kg 3.Hard rubber caster, Other threaded stem fittings is available 4.Good quality 1 ... : from 70g up to 90kg per caster 2.Wheel diameter: 75mm,100mm, 125mm3.Caster material: Hard rubber with delrin bearing,pressed steel,zinc plated ... 2011 is USD27,000,000. Our wheel diameter is from 15mm to 300mm, materials include rubber, TPR, PU, plastic, nylon, cast iron ...