You should measure the nipples, on both front and rear just in case they're different.
3/16" ID is a common size. If you get clear vinyl it stretches (until years of UV exposure harden it) and seals quite well (except in winter, the cold hinders that but merely holding it in your hand to warm it (or storing it in a heated area) helps a lot). Using vinyl I don't need any clamp or tie to make it seal on a bleeder screw nipple in reasonably good (non-corroded or sanded smooth on the perimeter sealing surface) condition.
Last edited by Dave9; 02/12/20 06:24 PM.