Description: High Quality Material: Our pool cue rubber buffer is made of high quality aluminum alloy and rubber, which is durable, shockproof and non slip. Use: The billiard bottom plug protector is used to connect the club and extend the tail of the handle. Easy to Install: The billiard cue back plug screw is simple to install, convenient to store and use. Great Replacement: The cue head screw pool cue block End, simple and classic look, is a great replacement part. Perfect Gift: It is a good gift for family members, colleagues, or friends who like to play billiards. Specification: Material:Aluminum Alloy, Rubber Size Chart: Style A: The diameter of the joint part is 0.624inch Style B: The diameter of the joint part is 0.628inch Style C: The diameter of the joint part is 0.612inch Style D: The diameter of the joint part is 0.618inch Style E: The diameter of the joint part is 0.609inch Style F: The diameter of the joint part is 0.355inch Style G: The diameter of the joint part is 0.525inch Style H: The diameter of the joint part is 0.60inch Package Includes: 1 Billiard Bottom Plug Protector Note: Please allow slightly errors due to manual measurement and different monitors.