Tips for using: If you need to practice on the arm, wrap the straps 2 turns Product Description: Used for Professional Nurses Injections Training Practice The intramuscular injection practicing module is divided into the skin layer, muscle layer Wearable design, The blue Elasticity 50cm long strap can be worn on the thigh and arm, increase the realism of the operation Size:13.4x3x2 in(34x7.5x7cm), Tape size 2.5cm width x 50cm length, Bottom pad thickness: 2cm, Practice sponge thickness: 1.8cm Packing List: 4 Pcs Injection Training Pad 4 Pack La Guardian Plastic Intramuscular Injection Pad Nurse & Medical Training.