1. It consists of cone, backing plate and base plate, simple structure. 2. Cone head made from aluminum alloy. 3. Base plate made from stainless steel, durable use, there is scale in the plate in order to reading data conveniently. 4. Cone: Up diameter: 38mm; below diameter: 89mm; height: 76mm 5.Base plate: thickness: 4mm; there are concentric scale lines. Span is 0.5cm
