rubber dumbbell 1.material:cast inron and rubber coated. 2.specification:on demand 3.benefits:training muscle rubber dumbbell specificationmaterialdescription unit price(FOB Qingdao) USDRMB1, 0, 42, 1, 2, 1, 43, 0 Bitmap comply with international standardcast-iron and rubber coatedcomply with international standardUS$1.007 1, raw materials: the main material is cast iron, and some outsourcing is ...