Sure-Flex PVC T-Joint Covers are used to seal step-offs at splice intersections. Installation is required on all 80-mil PVC systems and on 50-, 60-, and 80-mil systems where step-offs have not been properly sealed. PVC T-Joint Covers are formed from 60-mil white and 40-mil gray and tan non-reinforced PVC cut into a perfect 4.5 "-diameter circle. Packaged in a box containing 100 covers. Available in white, gray and tan