This straight orthosis is easy to use and has a remarkable effect, allowing the practitioner to pay more attention to the rhythm and intonation. more convenient for beginners to practice. Durable and meticulous workmanship. for portable carry. Made of high- quality environment- friendly silicone, skin- friendly, toughness. Self bowing practice guide and it help you cultivate correct bowing and wrist action. Colour:blue Material:Silica gel Package Contents: 1 x Snail Holder 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.