Description: [Premium Material]: Our billiard bumper is made of quality aluminum alloy and rubber, good durability, lightweight, long using time [Features]: The billiard bottom plug protector case is for connecting the club and extension handle [Workmanship]: The pool cue extension is with fine craftsmanship, wear and drop resistant [Easy Install]: The billiard cue extension bumper is simple install and convenient storage and using [Great Replacement]: The club head screw pool cue block butt with simple and classic appearance, a great replacement part Specification: Material: Aluminum Alloy Rubber   Size Chart:25.5x23mm or 1.00inchx0.91inch,Thread inner diameter 14mm or 0.55inch,Outer diameter 15.6 mm or 0.61inch Package Includes: 1 Billiard Bottom Plug Protector Case  Note: Please allow slightly errors due to manual measurement and different monitors. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.