Features:1. Applicable instruments: violin.2. It can help improve the tone of the thrust.3. The workshop is handmade, and the quality is exquisite and exquisite.4. It can be trimmed and polished, and it is cheap and good. Violin Code Installation Guide:Step 1: hold the knob and loosen the strings. Step 2: place the piano code, each string corresponds to each piano code card slot, the high and low parts on both sides of the code, the thick strings are placed in the high place, and the thin strings are placed in the lower one. The third step: the piano code is simple, and the place where the piano code is placed is the position of the center point of the F-hole cutout on both sides, and the position must be vertically aligned. Step 4: tune the strings one by one. Specifications:Material:MapleColor: maple colorModel: 4/4, 3/4, 1/2, 1/16, 1/8Size:(4/4) 50mm*40mm*5mm/1.96*1.57*0.19''(3/4) 45mm*40mm*5mm/1.77*1.57*0.19''(1/2) 45mm*40mm*5mm/1.77*1.57*0.19''(1/16) 30mm*30mm*5mm/1.18*1.18*0.19''(1/8) 35mm*30mm*5mm/1.37*1.18*0.19''Net Weight: 3gGross Weight: 3gNotes:Please allow 1-3mm differs due to manual measurement. Due to the different display and different light, the picture may not reflect the actual color of the item. Thank you for your understanding.1 X Violin Code