001
Bearing Wheel

Material:Axis Copper
Feature:Sliding smoothly,Strong load-bearing,Widely used in up ordit sliding , cannot be used in down orbit for no waterproof and no rust protection

002
Copper core wheel

Material:Brass Core +304 Stainless Steel Ball
Feature:Waterproof & rust-resistant,Sliding smoothly,Widely used in down ordit

003
Copper sleeve round

Material:Copper Sleeve
Feature:Waterproof & rust-resistant, Sliding smoothly , Strong load-bearing Suitable for up/down ordit