Yes, 1/8" brass tubing.

It's very wise to solder some Dubro barbs on the ends of the brass tubing and zip tie over theneoprene. You never have a clunk line fall offif you do this. You can just solder some wraps of thin copper wire on the end too. I've also used 1/8 - 3/16 long stubs of the next size brass tubing. Lots of things work.