- Aluminum Flex:
7' lengths: R 4.2, 6, 8 or bare, 6" - 10", 12" - 22" even sizes, black vapor barrier
10' lengths: bare no collars, 3" & 4" - Wireflex:
25' lengths: R 4.2, 4" - 10", 12" - 20" even sizes, silver jacket
6' lengths: R 4.2, 6" - 20" even sizes - ThermaFlex:
25' lengths: R 4.2, 4" - 20" even sizes