diameter central hole: 11 1/2 in (288 mm)

T174: Nut for adjusting screw

Ambidextrous: Yes (right and left-handed use)

Pedal operated pump leaving both hands free for working

Quick change disc mount quickly and easily to removable backing pads

Milton 3/8" MNPT P-Style Coupler (Ea.) - M-1806 Tire Handling_Tire Rack diameter central hole: 11 1/2Looking for a reliable and durable pneumatic coupling? Look no further than the Milton P style coupler! With a 3 8in basic flow size, this heavy duty steel coupling is perfect for a variety of applications. It also has a maximum temperature of 250 degrees Fahrenheit and an air flow of 68 standard cubic feet per minute. Features: 3 8in male national pipe thread Maximum of 300 pounds per square inch Air flow of 68 standard cubic feet per minute Maximum