Lang Tools TU-15 Diesel Compression Tester Tests cylinder pressure on diesel cars and trucks Deflator allows for an air release and automatic reset of the gauge for repeat testing Swivel end quick coupler provides easy connection to all Lang diesel compression adapters 16-1/2" wire reinforced hydraulic hose Easy to read dual scale red and black 2-1/4" gauge has ranges from 0-1000 PSI and 0-70 bar