... price. 1.Product specifications:1.Caster materials:Plastic2.Loading capacity: 15 to 40kg per caster3.Wheel diameters: 30, 40,50mm4.Matching ... stem6.Available in usual, light or strengthened styles7.Suitable for bads9.Complies with international quality standard: ISO 9001:200010. ... , phenolic and sandwich, etc. Our housings have special sizes for different areas, such as Euro type, American type, and ...