What is for?High quality products. Get better performance for your Labeling Machines. Specs:Materia:Plastic + MetalWork Current:15AWork Voltage:250VWork Model:Self ResetMaterial = Plastic, MetalA = 28 mmB = 16 mmC = 10 mmD = 28 mmE (diameter) = 2.5 mmF (diameter) = 3.3 mm