1. 1000 psi 2. 2.5 * 40 inch 3. SUS 316 caps. FRP RO membrane pressure vessel is a critial part to hold the RO membrane and offer porper port to connect to other components in RO systems. Popula size:2.5" * 21"2.5" * 40"4" * 40"4" * 80"8" * 40" , 80", 120", 160", 200", 240" port can be end port or side port, SS316 stainless steel.