5.5" Triple Groove Pulley fits B Section V-Belt 5L with 5/8" Sheave Bushing 3BK57H Liquid Filled Pressure Gauges CB It also purges the air

It also purges the air on everything down line

• Inlet & Outlet: 1/4" Female NPT (measures about 1/2" in diameter)

the other two sides both have 1/8" female NPT ports which are normally used for an air pressure gauge to see what pressure you are regulating

If your application doesn't require an unloader line

• Modular Aluminum Compressed Air Piping

5.5" Triple Groove Pulley fits B Section V-Belt 5L with 5/8" Sheave Bushing 3BK57H Liquid Filled Pressure Gauges CB It also purges the airCast Iron 5. 5" Triple Groove 3 Belt B Section 5L w 5 8" Sheave Bushing Masterdrive triple groove 5. 5" cast iron pulley sheave with a 5 8" H bushing for B section belts is a high quality 2 piece pulley that measures 5. 5" outside diameter and is designed to be used with an H style bushing. The bushing inserts into the center of the pulley and slides over the shaft, as you tighten down the bolts on the H bushing it will tighten down on the shaft