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

Material : EPDM Polymer & Natural Polymer & SBR Polymer

80 mm Pipe Ring = L-501
100 mm Pipe Ring = L-502
150 mm Pipe Ring = L-353
200 mm Pipe Ring = L-355
225 mm Pipe Ring = L-503
250 mm Pipe Ring = L-356
300 mm Pipe Ring = L-357
350 mm Pipe Ring = L-354
400 mm Pipe Ring = L-504
450 mm Pipe Ring = L-505
500 mm Pipe Ring = L-506
600 mm Pipe Ring = L-507
700 mm Pipe Ring = L-508
800 mm Pipe Ring = L-509
900 mm Pipe Ring = L-510
1000 mm Pipe Ring = L-511
1100 mm Pipe Ring = L-512
1200 mm Pipe Ring = L-513
1400 mm Pipe Ring = L-514
1500 mm Pipe Ring = L-1009
1600 mm Pipe Ring = L-515
1800 mm Pipe Ring = L-669
2000 mm Pipe Ring = L-867