Thank you for your interest in our product. The BOSS FS-7 has rubber feet for convenience, but this prevents the use of double-sided tape, creating the problem of not being able to fix it to an effects board. To solve this, we have created mounting parts to flatten the bottom. By attaching this product to the FS-7 with silicone tape or easily removable double-sided tape, you can mount it on your effects board without any stickiness. 【Target Product】 This is a part designed for the BOSS FS-7 switch. ※ The effector itself is not included. 【Material】 Made of PLA (black). Although we check the products, due to the nature of 3D printers, there may be minor burrs, layer lines, stringing, and support material marks. Please understand. 【Other】 To avoid any problems after purchase, please make your purchase after you are satisfied. You can purchase immediately without any inquiries. Thank you for your consideration. #guitar #bass #Boss #Roland #FS7