Product Name: Check Valve Material: Brass with Nickel, Brass Size: 1' Trademark: N/M Transport Package: CTN Origin: Guangzhou, China Product Description Check valveMaterial: Brass with nickelThere are three specification: 1 1/4''long non-return check valve1''short non-return check valve1 1/2''short non-return check valveSpecial design for applying on B600S complete set constant pressure control.