IRIN Shoulder Backrest Violin Rib Shoulder Rest 4/4 & 3/4 Light, Violin Rib Shoulder Rest Soft Bridge for Pad Violin Rib Shoulder Rest1. this IRIN standard shoulder rest is our most popular model, it fits size 4/4 violins and can be adjusted for size 3/4.2 violins. High density wear-resistant sponge, comfortable and convenient.3. New high strength and environmentally friendly rubber anti-slip pinch does not hurt the surface of the piano and is not easy to fall off.4. Violin seat belt overlay (violin seat belt overlay): lining between the violin and the shoulder, so that the position and direction of the violin on the shoulder is relatively stable, the violin is not easy to fall, the neck does not need to kneel, reduce the neck and the hunchback trend. Specification:Net Weight: 56.8g Color: Black Material: ABS + Silicone + Cotton Foam Size: 21.4x6.5x4.8cm Package Content: 1 * Violin RibOnly the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement error is +/- 1-3cm.