Standard quality pool table rail rubber. Standard rubber comes in 3 different profiles K-55, K-66, and U-23. K66 and K55 are 47" long and U23 are 43 inch length which is long enough to fit up to a 8 foot long table. The best way to determine your rail profile is the remove the rubber from the wood and cut it in half so you can see the profile and get correct measurements. Rail comes in a set of 6 that have to be installed on your rails with contact cement and cut to fit.