The ALKIN W31 is a small portable compressor designed for personal use. CGA G7.1 E quality breathing air. The ALKIN comes complete, tested full of oil and ready to run. Available in gas or electric power.  This compressor runs at 1200 RPM for the coolest and quietest compressor in its class.  This compressor has a 5000 PSI max with a working pressure of 4600 PSI. The purifier is a refillable type that saves you money.  With ALKIN you will get the most powerful compressor, best shipping prices and we do not exaggerate our CFM performance.  All of our compressors are designed to be durable, easy to work on and parts are readily available at a reasonable cost. Our goal is to provide the most value for your money. We stand behind our warranty and our products.