RCC Pipes are generally made as per IS:458. The said IS prescribe usage of Rubber Rings as per IS:5382-1985 Type.

Material : EPDM Polymer & Natural Polymer & SBR Polymer

400 mm Pipe Ring = L-556
450 mm Pipe Ring = L-557
500 mm Pipe Ring = L-558
600 mm Pipe Ring = L-559
700 mm Pipe Ring = L-560
800 mm Pipe Ring = L-561
900 mm Pipe Ring = L-562
1000 mm Pipe Ring = L-563