The Drain Kat is an over the shoulder refillable, nitrogen or CO2 mini drain cleaning kit. Featuring a small cylinder that holds 9 cubic feet of nitrogen or 2-1/2 pounds of CO2. The cylinder includes an integral mounted regulator for quick and easy adjustment of discharge pressure. Get exactly the amount of pressure you need with a quick adjustment on the regulator. Furnished complete with an 87" hose and drain gun kit, the CW-15 whip hose, and the AP-DK Drain Kat Accessory Fitting Kit which contains the DF-75 Drain Dawg inflatable tip, the CB-03 3/4"-1" cone fitting, the FA-01 male to male CO2 to nitrogen adapter, the FA-03 CO2 trans-fill adapter, and the QN-S3 needle tip. Made in the USA.