1PCS Accurate Rust proof Open Linear Bearing Slide Block Motion SBR20UU

The shell is made of metal, durable for use. Standard processing makes the product has high interchangeability. The inside slide block is a high precision liner bear. Surface oxidation treatment, beautiful, and rust-proof. High accurate and stable performance. Specifications: Model: Size(Approx.) Installation Screw Size(not included) Weight SBR10UU 36 x 32mm / 1.4 x 1.3in M5 67g SBR12UU 39 x 40mm / 1.5 x 1.6in M5 93g SBR16UU 45 x 45mm / 1.8 x 1.8in M5 143g SBR20UU 50 x 48mm / 2.0 x 1.9in M6 185g Material: Metal Package List: 1 x Slide Block .