Check the listing for details. Tool Aid 33600 Exhaust Back Pressure Tester. Condition: New. Listed at 54.99 USD. *************************** Tool Aid Exhaust Back Pressure Tester Description Use to test for clogged or obstructed catalytic converters and mufflers.Fast and easy to use - threads into Oxygen Sensor Port.Includes 12mm and 18mm adapters to fit most domestic and imported vehicles.Gage measures 2 1/2" diameter and has dual scale: 15 PSI and 1.00 Kg/Cm2.Hose is 41" long. Brand New and Never Been Used! Still in Original Packaging. WE SHIP WORLDWIDE! FREE SHIPPING in the USA! CBM TOOLS SHIPS THE DAY YOUR ORDER IS CONFIRMED! Handling Time is 1 Business Day of receiving your payment. Actual shipping time varies depending upon your location. We ship from Oregon and QUALITY IS GUARANTEED! We here at CBM TOOLS strive to provide 5-STAR Service every day. Your personal satisfaction is guaranteed on all products we sell. Visit our E-Bay Store for more, GREAT PRODUCTS @ GREAT PRICES!