This product is such as heavy card series plate spring stiffness, a total of 10 pieces of order. 1-2 slices of specifications for 90 * 16, 3-8 pieces of specifications for 90 * 18, 9-10 specifications for 90 * 16, material are 50 crva, length of 1800 plate spring loading, front end lug installed aperture Φ 30, back-end lug installed aperture Φ 30