Enhanced version difference: 1. Packing label, the arc side version is a paper label, and the enhanced version is a silver dragon label. 2. Color, the arc version is grayish white, and the enhanced version is pure white. 3. Hardness, arc edge version hardness is lower than the enhanced version. 4. Slip, the enhanced version is more slippery than the arc version. Specifications: for:Razer Viper Mouse Arc edge design Color: White Material: for Teflon Thickening replacement type, for replace the original mouse feet Quantity: 1set per pack We find that after using the cloth mouse pad for a period of for time, the surface of the mouse pad will be damaged to varying degrees. The original flat surface will have a large number of wool breaks, which will make the original smooth mouse pad become astringent and difficult to use, and the feel will become erratic. Tiger Gaming 2018 new edition Mouse feet changes the traditional straight edge mouse feet, so that for sharp foot sticker edge becomes smooth, no longer cut your favorite mouse pad, arc edge shape, avoid wear and tear, add a for protection to your mouse pad BUYER READING: This product is a replacement mouse feet. After removing the original mouse foot sticker, clean the bottom for shell by the alcohol cotton which is attached in the package, and then paste the new mouse feet on. After removing the transparent protective film on the mouse feet, carefully align the feet groove on the mouse bottom for shell, then apply slight pressure to fit the foot. Do not repeatedly stick and peel off the foot stickers. Package includes: 1 Pack x Enhanced Mouse Skate for Razer Viper mouse(1Sets)