Item Type: Piano Finger Exerciser_x000D_ Material: ABS + Silicone_x000D_ Colour: Black 1[PALM DESIGN] This piano finger trainer is palm shape design, convenient to hold and help adjust the finger posture. 2[STANDARD SIZE] The ratio to the real piano is 1:1, the standard piano spacing is more conducive to correcting finger. 3[SILICONE MATERIAL] Made of silicone material, the keys have sufficient rebound force, and is non slip and stable. 4[2PCS EXERCISERS] Includes 2pcs finger strength exercisers for easy operation, suitable for adults and children. 5[EASY OPERATION] Scientific arc design, with efficient and labor saving operation, suitable for beginners to operate.2 x Piano Finger Trainers 1 x User Manual