Specifications: The rubber compound is made of high quality rubber. The size of the thick rubber shovel is 1.9" W x 4.9" L, with a minimum tensile strength of 725 PSI (5 MPA). The metal band is approximately 1.3" W x 3.7" L. Bolts and Locknuts: Hex bolts are 5/16-18 x 1" coarse thread with 5/16-18 locknuts (installed with 1/2" wrench and socket). The package also comes with 9 self-locking screws, all screws are made of high quality metal materials. Function: This snow blower impeller conversion kit reduces the existing "gap" between the snow blower impeller blade 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 to get clogged with snow. Note: Before ordering, please make sure the part number of your new spare part matches your old unit. Color: As shown Material: Metal+Rubber Size: Thickness 3/8 inch Package Contents: 3 * Rubber Shovels 3 * Metal Straps 9 * Bolts and Lock Nuts 9 * Self-tapping Screws The above package contents only, 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 +/- 1-3 cm.