Bracket K Series is made of steel up to 5.5 mm thickness, very strong and galvanized (Zinc) to increase rust resistance for the bracket. PP-reinforced TPU tires, so moving will not make as much noise as hard PA and PP wheels.
Reliable caster for heavy duty needs. 6.0 mm of steel bracket thickness with double ball bearing raceway. Flat PU tread wheel creates less noise when operate.