9 Ball Pool - for standard 2 inch ball size 50.8mm

9 Ball Pool diamond for 2 inch Pool balls - this rack is perfectly measured based on 50.8mm/2 inch pool balls which are the common standard

Also see my mini triangle for 2 inch balls to play the 6-Red Shootout Can you beat the World Record of 10.89 SECONDS!!!!!

Here is a link to the facts and stats and you can find plenty of attempts including the World Record video
The 6-Red Shootout - Stats and Facts - Article - Ultimate Pool Group