These "T" Line strainers are made of heavy-duty glass reinforced polypropylene. The screens are polypropylene ribbed 316 stainless steel and the standard gaskets are EPDM. These strainers have a 150 psi at 70°F maximum pressure rating. We offer these strainers with either 50 or 80 mesh screens. Convenient color coding allows for easy mesh size identification with blue 50 mesh screens and yellow 80 mesh screens. There is a clean out plug in the bottom for draining. The Poly Micro Valves can be purchased separately and used instead of the drain plug for a more convenient way of cleaning these strainers.