Thank you for viewing. This is a knob guard made by BOSS. Created with a 3D printer. Set contents: ・Knob guard x 1 ※Effector unit not included. Material: PLA Color: Black I created this because even when I had switch covers on during live performances and studio practice, my foot would sometimes hit the knobs. Now I can step on them with confidence. There are also benefits such as preventing knobs from being bumped inside the effector case and making it easier to check the LED lamps. Due to variations, it may be slightly tight in some cases. The product may have burrs, layer lines, stringing, chipping, and marks from removing support material. Please be aware of this. It will be shipped in simple packaging. Please purchase after understanding to avoid any problems. If you have no questions, you can purchase immediately. Thank you. #BOSS #Effector