What is for?High quality products. Get better performance for your Labeling Machines. Specs:Material = Plastic, Aluminum, Steel, Other.A (thickness) = 15.3 mmB (thickness) = 10.5 mmC (thickness) = 5 mmD (thickness) = 10.5 mmE (thickness) = 43 mmF = M6 – 1.0G = 2.5 mmH (diameter) = 20 mmI (diameter) = 50 mmJ (diameter) = 75 mmK (diameter) = 99 mmL (diameter) = 40 mmM (diameter) = 50 mmN (diameter) =74 mm