Use the Gruv Gear Fump when you're playing your 4 - or 5 - string electric bass and want to quickly get that old - school muted or upright tone without using your palm. It's perfect for bass players of all levels who are looking to discover new playing techniques. This dampener doesn't need much space, only 1' (2.5 cm) between the pickup and the bridge. It's easy to put on and take off, and you can clip it to your strap or music stand when you're not using it. The muting materials are replaceable, so you can keep using it for a long time.