Designed for providing extra rest, it will not damage your instrument or scratch your hand during use, will not obstruct driver's view. Made of premium material for long time and durable use. It has a simple design, but very practical in use, giving you a good using experience. Also can be a good gift choice for your friends, they will like it. Features -Color:Black -Material:plastic-Size:6.50X1.20X1.10cm/ 2.55X0.47X0.43in- Eliminate thumb soreness, provide extra thumb rest and protect your instrument and hand.- Softening and durable, it can help to maintain correct finger position.- A great accessory for correcting hand posture and making great music.- The plastic material does not harm the instrument, very practical to use.- It is simple in design, but very practical in use, which brings great convenience to you. Packing list: 2 x thumb rests4 x screws