The Sealey 10 Piece Digital Compression Test Kit is a professional diagnostic tool designed for testing engine compression in petrol vehicles. This comprehensive kit delivers real-time compression pressure readings through a large 2.8-inch backlit digital display, making it easy to read measurements even in low-light workshop conditions. The digital gauge offers exceptional accuracy of 0.5% FS across a working range of 0-435psi (0-30bar), with the ability to display readings in psi, bar, or kg/cm² to suit your preference. The high-resolution display shows measurements to 0.01 increments across all units, whilst the auto-power-off function helps preserve battery life during busy workshop days. This versatile compression tester includes everything needed to test most petrol engine cars and light commercials. The kit comprises four extension hoses with a generous 1150mm total length, five plug thread adaptors covering sizes from M10 to M18, and a self-sealing quick connector for secure, l