screw 1.available long time ANti rust 2.color:silver 3.weight:0.12g\pcs 4.passed IOS9001:2008

1. high  cost performance.

2 .rious surface treatment.

3 .HS ISO pproved

4.our cost is lower than others.

5.fast delivery channels.

passed IOS9001:2008 lead screw for professionals