The Tuning Fork Activator is made of heavy rubber and allows you to easily tone your forks without damaging them. Striking the forks against each other can nick them, striking them against your hand or leg can be painful. This activator was designed to protect them from nicks which will change the pure tone of the fork. Generally this is not stocked, order takes approx 2 weeks. Made of solid rubber, measures 4"x 3"x 2