ANTI-RUST AND DURABLE: Adjuster adopts premium metal, anti-rust, outstanding durability and stability with fine workmanship, high glossiness surface, designed for 3/4 4/4 Cello. EASY TO INSTALL: Easy to mount onto your cello, the screw works smoothly with good precision, very special and good-looking, non-discoloring and matched for your instrument. 4PCS / SET: 4Pcs / Set comes in a package, good replacement parts for cello, a very useful music instrument accessory for your practicing and playing. COMPACT SIZE: It is portable with and compact size, easy for carry and storage, practical to use. Colour:black+gold Material:Metal Size: 4.5 x 4.3 x 0.7cm Package Contents: 4 x string trimmers Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.