Features: Style 1: All aluminum alloy CNC carved, anodized.Anti-corrosion and wear resistance. Anti-collision and lightweight performance. Perfectly fit in,easy to install. Fine workmanship and perfect style. Style 2: All aluminum alloy CNC carved, anodized.Anti-corrosion and wear resistance. Anti-collision and lightweight performance. Perfectly fit in,easy to install. Fine workmanship and perfect style. Does not affect the sensing block and passability Style 3: All aluminum alloy CNC carved, anodized.Anti-corrosion and wear resistance. Anti-collision and lightweight performance. Perfectly fit in,easy to install. Fine workmanship and perfect style. Does not affect the back cover opening and closing,and the battery installation Notice: Actual color may be slightly different from the image due to different monitor and light effect Please allow 1-3cm deviation due to manual measurement Specification: Style 1: Material: CNC aluminum alloy; stainless steel screw Size: 7x2.15cmProtective Wheel Style 2: Material: CNC aluminum alloy; stainless steel screw Size: 15x6.75cm front protection bumper Style 3: Material: CNC aluminum alloy; stainless steel screw Size: 5.8x1.4x13.9cm rear protection bumper Package List: Choice 1: 2x Protection wheels 3x Screw 1x Screwdriver Choice 2: 1x Rear bumper 3x Screws 1x Screwdriver 2x Cushions Choice 3: 1x Front bumper 2x Aluminum sleeve 8x Screw 1x Screwdriver 2x Cushions