9"/11"/13"/15 Inch Drawer Slides Metal Ball Groove Bearing Runners 27mm MaterialCold-rolled Steel with Steel Ball Bearings Color: Silver Tone Thickness:8mm ;Width: 27mm Various Lengths available in each Groove Size, Please kindly choose your required size ! One pair of drawer runners need 2 x M4 Grub Screws and 6 x Hospa Wood Screws to fix(Not included)