MASTERCOOL 90262 3 Piece Manual Shut-off Valve Adapter Set Straight and Manual Shut-off Valve Set includes: Blue 1/4" x 1/4"; Yellow 1/4" x 1/4" and Red 1/4" x 1/4" Ball valve design with flexible hose controls refrigerant with a quarter turn of the valve handle Meets SAE, EPA and UL requirements for containment of refrigerant Can be operated with one hand Screws onto charging hose end