[2 Pack] HGR20/HGH20 300mm / 11.81inch Linear Sliding Rail Guide with 4 HGH20CA Linear Bearing Sliding Carriage Block for 3D Printer, CNC Machine and Routers (300mm, HGR20/HGH20)

Packing:2 x 300mm / 11.81inch HGR20/HGH20 Rail Guide and 4xHGH20CA Sliding Carriage Blocks Material: Steel/ Bearing Steel Size:300mm / 11.81inch long, tolerance ± 0.5mm Feature: Smooth motion ,Low noise,Durable Suitable for 3D printer , CNC machine,Routers,automatic machine,molding machine