INNOVA 3612 Compression Tester - 4 Piece Kit Designed to perform compression tests to help identify damaged pistons, worn rings, burnt valves, and blown head gaskets Works on conventional, electronic, and computerized domestic and import vehicles Features 2-1/2-inch dial face with Bourdon tube meter and dual-calibrated scales which read 0-300 P.S.I. and 0-2100 k.P.a. Includes 15-inch rubber hose, side release valve and adapters (12mm, 14mm and 18mm) Can also be used for motorcycle, ATV, snowmobile, and marine applications