If you encounter problems during the shopping process or after receiving the package, please contact us in time, we will reply and solve the problem for you as soon as possible. The product will send a grip suitable for Viper Ultimate Wireless by default. If you need other mouse models, please contact customer service first, and note the required mouse model when placing the order. The mouse models that can be made are shown in the picture, and we cannot make other models. If you need to cut it yourself, please let us know to send a whole piece. Our Mouse Grip is a lightweight textured grip that is optimized for feel and control. We have tested hundreds of mouse grips and had hundreds of tests done on our grip and we think we created the perfect Mouse Grip for everyday use and for hardcore gamers. Our Hokeyio Mouse Grip made with a polymer that is ultra-comfortable and is a slip-resistant material for ultimate use.can only be truly appreciated by touch and once you try it you will be wondering how you ever went without one!. Package content: please refer to the option picture (without side button).