Usage Tips:Specifications: Rubber slurry is made of rubber, The size of the thick rubber paddle is 1.9inch W x 4.9inch L, with a minimum tensile strength of is 725 PSI (5 MPA). Metal band is approximately 1.3inch wide x 3.7inch long. Bolts and Locking Nuts: Hex bolts are 5/16-18 x 1inch coarse threaded with 5/16-18-locking nuts (install with 1/2inch wrench and socket). Package also comes with 9 Self-locking screws, all screws are made of metal materials. Function: This snow blower impeller conversion kit reduces the existing "space" between the snow blower's impeller blades and the impeller chamber wall. The smaller the space, the higher the machine's operating efficiency and snow-throwing capacity, and the less likely it is that the machine will become clogged with snow. Note:Before ordering, please make sure the part number of your replacement unit matches your old unit. Colour:As Shown Material:Metal+Rubber Size:Thickness 3/8Inch Package Contents: 3 * rubber paddles 3 * metal straps 9 * bolts and lock nuts 9 * self-tapping screws Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.