Titan Tools #45252 Vacuum Cap Assortment, Buna-N Rubber, 100-Piece, Kit. Titan vacuum cap kits can provide a sure way to seal vacuum line connections on your carburetors, manifolds, etc., when the vacuum lines have been removed. These vacuum caps are constructed from durable, heat-resistant Buna-N rubber.Assortment Includes:* (20) 3/16 in.* (20) 5/32 in.* (20) 7/32 in.* (10) 1/4 in.* (5) 5/16 in.* (5) 3/8 in. Click Here. Double your traffic. Get Vendio Gallery – Now FREE!