Drawer slides: Certificate: SGS Size: 10, 12, 14, 16, 18, 20, 22, 24 inch Packing: 25 pairs per carton Material: iron Drawer slides:Certificate: SGSSize: 10, 12, 14, 16, 18, 20, 22, 24 inchPacking: 25 pairs per cartonMaterial: ironOEM is welcome drawer slides