Circular chamfering, smooth experience. It provides you with great advantages of Micro-Type 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 X Wireless / G502 X PLUS Wireless Mouse type: B-With sensor patch in the middle Material: High aluminosilicate glass colour: Black Package Contents: 1 set 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.