For a smooth transaction, please read our profile before purchasing. This is a knob guard/setting saver for the Darkglass B7K/classic ultra. - The knobs are completely covered from above, so you can rest assured! - Prevents problems such as knobs breaking or bending! - Prevents problems like "I feel like the settings have changed a bit"! - Protects the value of your effector by preventing scratches! - All items are inspected! - It fits perfectly and won't fall off! Please feel free to contact us if you have any questions about whether this can be used with your pedal, or if you would like us to create something for a different pedal. - This product is made by an amateur using a 3D printer. We test for normal function before shipping, but please understand that there may be individual differences. - If no color is specified, we will send a random color. Available colors are listed in our profile. Colors other than those in stock will incur an additional charge of ¥250 per color. - We also offer discounts for multiple items and combined shipping with other items. Please feel free to inquire.