Description: Roller String Retainer Mounting Tree Guide for 3 String Bass Guitar Box Guitar Parts Suit for 3-string bass guitar box guitar Made of high quality material, durable Material: Zinc alloy Size Chart: Size: Approx. 43 x 8.6 x 7.7mm/ 1.69 x 0.33 x 0.3inch Package Includes: 1 Piece String Guide 2 Pieces Screws