Features: Make of excellent aluminum and rubber materials, antiwear and drop resistance, long terms use. The billiard cue bottom cover is used to connect club and the extension handle, convenience and easy to use. Can effectively protecting the bottom of billiard cue and prevent collision damage. Small and light weights, this billiard bottom cover is easily to carry and store. Suitable for professional billiard player and suitable for enthusiasts of all level. Specifications: Materials: Aluminum and rubber Style: 1/3/4/2/5 Internal teeth: 3/8-11 teeth Size: As show in picture Package Includes: 1pc Billiard Bottom Plug note: Please allow 1-2cm errors due to manual measurement, make surely that you not mind before order. Due to difference between different monitors, the picture may not reflect the actual color.