Technology: Ultra-precision CNC mechanical carving molding, light weight, high precision, good quality. Material: CNC high-density aluminum alloy, anodized and colored in , no fading, no rust. Applicable model: Common to all boots with release base Condition: 100% Brand New Color: Silver Material: Aluminum Alloy Package Contents: 40 x Boot Base Mats Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in a little different from the real thing. The measurement allowed error is +/- 1-3 cm.