ITEM NAME:Aluminum Alloy Violin Chin Rest Screw for 1/8 1/4 1/2 3/4 4/4 Violin Black A#S Product Description Description: Aluminum Alloy Violin Chin Rest Screw for 1/8 1/4 1/2 3/4 4/4 Violin Musical Instrument Accessories Black Feature: Made of dyed black aluminum; Designed for 1/8 1/4 1/2 3/4 4/4 violin; Specification: Material: aluminum alloy Colour: Black Product size: 145 x 40 x 5mm/5.71 x 1.57 x 0.20" Net weight: 12g Gross weight: 12g Included: 1 X Violin Chin Rest Screw.Included: 1 X Violin Chin Rest Screw. Material: aluminum alloy. Made of dyed black aluminum;. Colour: Black. If item is defective after 3 months, you can still send it back to us. We will send you a new one after receiving the defective item.