●Size / (hole diameter) S: 1.95cm, L: 2.2cm, (hole minor diameter) S: 1.45cm, L: 1.7cm, protrusion height: 4cm
Weight: S: approx. 7.3g, L: 7.9g
●Material: Nylon 12
●Country of origin: Japan
●Number of pieces per case: 3 ・Just place it on your thumb and have your child bite down on it. It maintains a constant opening and prevents accidentally biting your finger.
