NUT UPPER NILFISK 000 hours based on B 10 Size:307 000 hours based on B 10 bearing life rating Condor switch Silent Air Technology helps this air compressor run quietly All steel connecting rods with replaceable rod bearing inserts can be rebuilt Removable 100% cast iron cylinders are more stable under heavy workloads and do not warp from heat All cast iron cylinder heads are more durable and dependable Disc valve design intake and exhaust valves come right out of the top of the cylinder head where they can be serviced in minutes Top quality compression and oil rings ensure performance with low oil carry over (1 5 PPM) Precision ground pistons machined to tight tolerances ensures low oil carry over Premium non absorbent gaskets prevent oil seepage from pump All cast iron flywheel with built in fan gives the pump more throw on the compression stroke which will result in fewer loads on the electric motor Built in head unloaders Inter cooler allows air to be cooled between stages while the air cooled after cooler provides a second cooling stage that cools the air before it goes into the tank Large 1 3 8 in Fine to Medium Output 1