Description: Premium Material: Our billiard bumper is made of high quality aluminum alloy and rubber, durable, lightweight, long using time. Great Features: The billiard bottom plug protector case is for connecting the club and extension handle. Excellent 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 screws pool cue block butt with simple and classic appearance, a great replacement part. Specification: Material:Aluminum Alloy Rubber Size Chart: 2.3cmx2.2cm/0.91inchx0.87inch 2.7cmx2.7cm/1.06inchx1.06inch 2.7cmx2.3cm/1.06inchx0.91inch 2.7cmx2.8cm/1.06inchx1.10inch 2.7cmx2.2cm/1.06inchx0.87inch 2.7cmx2.6cm/1.06inchx1.02inch Package Includes: 1 Billiard Bottom Plug Protector Case Note: Please allow slightly errors due to manual measurement and different monitors.