The soft pool cue stick screw-on replacement tips are made of high-density leather, with 3/16"" brass threading, 12 mm in diameter, set of 10. The screw-on design is flexible to achieve quick replacement and maintenance during a billiard game, no glue required. The pool cue tips are great for pool cues with screw-in ferrules (not included), which can be widely applied to billiards games, home, entertainment places and more, enough to meet your daily replacement and use.