Circular chamfering,smooth experience. It provides you with great advantages of Mini and tracking, and has the feeling of floating. Round Edges Perfectly polished round edges will provide you with the smoothest sliding ever. feet sticker is made of aluminosilicate glass, fast and smooth.brand new and high quality. Note: It is not recommended to use with hard mouse pads such as glass and resin for G502 Wireless Mouse Thickness: 0.8mm Colour:Black Material:High aluminosilicate glass Package Contents: 1 set x foot patches 1 x warping piece 2 x cleaning wipes 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.