The housing is available in lengths ranging from two inches to over 20 feet. It consists of a 304 stainless steel body, barrel, piston, head and trunnion mount bracket. The assembly head is removable to allow installation of a rod style LDT, which screws into a standard Â¾-in.- 16 x 1.00 mounting thread. Metric threads are an option. The head contains a Â½-inch NPT conduit port for wiring the LDT.