10-inch to 20-inch stainless steel 45mm buffer slide rail

Model: SL-45-13b
Material:stainless steel
Specification: 45mm stainless steel,three section
Sizes:
10 inch 25cm  / 12 inch 30cm / 14 inch 35cm / 16 inch 40cm / 18 inch 45cm / 20 inch 50cm