The smallest of all of our spring contact vibration motors, the Z32TH7B2882001D uses a 3.2 mm diameter cylindrical motor wrapped in a silicon rubber boot. The over all height and width is a mere 3.8 mm x 3.8 mm, making it suitable for low profile CLICK  HERE to see photos of how this motor is typically mounted in the products housing. designs. The motor can be press fit into a suitably sized molded cavity in the shell of the products housing.