004
Stainless steel core round

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

005
Stainless steel copper sleeve round

Material:Stainless Steel Core + Copper
Feature:Waterproof & rust-resistant,Sliding smoothly, Strong load-bearing , Durable Suitable for medium-high grade products.

006
All stainless steel round

Material:All 304 Sfainless Steel
Feature: Waterproof & rust-resistant,Sliding smoothly Strong load-bearing , Duradle Suitable for high grade products.