●Fits for 4-string electric bass ●Total string spacing: 18x3=54mm (2-1/8 inch), mounting studs spacing: 98mm (3-55/64 inch), with M8 post and 12mm outer diameter bushing ●The tailpiece is made of high density zinc alloy, full metal diecast construction, with height adjustable steel post and zinc alloy bushing, solid and durable ●For top-loading type, hold strings firmly and make your bass stay in tune ●Package includes: 1 piece tailpiece, 2 pieces mounting studs, 1 piece wrench