Material3.5mm thick aluminum plate FunctionPerfectly flat, rigid surface for leveling the heated bed Dimensions(L*W*H): 190mm*190mm*3.5mm Package Include1pcs Y Carriage Plate with small plate , 4pcs pulley, 2pcs hex eccentric column, 2pcs isolation column, 4pcs M5x30mm screw ,4pcs M5 Locknut,1pcs Open end wrench 8mm to 10mm Widely UsedWith 4 pulleys on the plate, perfect working for the 3D printer,Easy to install, very convenient