Extra grade cork rings with 3/4" bore by CORKRINGS UNIPESSOAL
These rings are perfect for when you want to make a grip that requires an inlet in the back (for an up-locking seat). They are graded as "Extra" Each ring is 1 1/4" x 1/2 with a 3/4" bore.
Extra grade rings can be ordered in bags of 5, 10, 50.