SPRAY HEAD ASSEMBLY TWO GS-PLUS SPRAY HEADS. EACH HEAD HAS A ""FLIP TOP"" DUST COVER INTERNAL FLOW CONTROL AND FILTER TO REMOVE IMPURITIES FROM THE WATER FLOW VALVE 1/2"" IPS CHROME PLATED BRASS STAY-OPEN BALL VALVE. VALVE IS US-MADE WITH CHROME PLATED BRASS BALL AND TEFLON SEALS MOUNTING UNIT MAY BE MOUNTED ON RIGHT SIDE (G1806) OR LEFT SIDE (G1806LH) OF SINK. FURNISHED WITH LOCKNUT AND WASHER FOR SECURING UNIT TO COUNTERTOP SUPPLY 1/2"" NPT MALE INLET QUALITY ASSURANCE UNIT IS COMPLETELY ASSEMBLED AND WATER TESTED PRIOR TO SHIPMENT