3" 4" 5" bolt hole PU caster wheel with side brake
Housing:
Made of pressed steel，zinc plated.
double ballrace swivel head
transparent dustproof seal
Wheel:
Material:Polyurethane
Hardness:90±5 Shore A
Bearing type:Precision ball bearing
Temperature:-20℃～80℃
Feature:
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Polyurethane PU material, silence, Eco-friendly material,
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Wildly use in office chair,hand truck and shopping cart.
