Offer B Series Heavy nylon caster wheels: Tread nylon material with high mechanical strength, abrasion resistance, shock absorption, and other functions not to hurt the floor, double ball bearing structure is simple round, compact, turn more flexible, easier convenience. Bracket: low structure and unique arc-shaped design of double track, more resistant to weight, more practical, zinc coated stents can be waterproof, anti-oil, anti-corrosion. Greater improvement of corrosion resistance, longevity guaranteed. Use: Widely used in a variety of ground, resistance to chemical corrosion, radiation, etc., are widely used in various fields of medical, food processing plants, factories handling, warehousing and logistics industries. Temperature is -35 ~ 90 ℃. Appearance: Wheels unique formula of nylon molding, nylon wheel tread more features. Environmental factors capability sunlight, temperature variations, dust, rain and the like and the impact, generally will not rust within two years. Product Specifications: 4,5,6,8-inch mounting: flat side brake directional flat universal flat double brake