Features: 【TU-15 Diesel Compression Tester】 Designed to measure cylinder pressure on diesel cars and trucks. Comes with handy deflator for air releasing and automatic resetting of the gauge for repeat testing. 【Precise Pressure Gauges】 Dual scale dial with ranges from 0-1000 PSI / 0-70 bar. 2 scale red & black 2-1/4" gauge, more easy to read, efficient & convenient. Precise scale for accurate pressure measurement. 【Sturdy Gauge & Hose】 .