Description: for F4, A4 files and standard box files, anti-tilt safety interlock mechanism provides a much safer environment, which only allows one drawer open at a time, ball bearing slide Model and size(mm): S-DW4D---W458*D635*H1320(mm) with 4 drawers S-DW3D---W458*D635*H1007(mm) with 3 drawers S-DW2D---W458*D635*H694(mm) with 2 drawers S-LW4D---W900*D450*H1377(mm) with 4 drawers S-LW3D---W900*D450*H1050(mm) with 3 drawers S-LW2D---W900*D450*H 722(mm) with 2 drawers