This is our module Crystal Chamber Made in the U.S.A. Designed by Jakku and is made from Brass. utilizes 3 1/8 copper tubes for support of the radiator fins plus also allows for 22 gauge wire to go threw easily. two sizes available 22mm by 51.2 and 27mm by 51.2. We now have added the copper adaptor holder with insert.Plus 3 thinner radiator fins. This is a kit that has no limitations except for your own imagination.