Lang Tools (TU-30A) Compression Tester Set is for all domestic and foreign cars and light trucks with gasoline engines, including mini engines. The set features an M68 (2-1/2") gauge with a dual scale dial that ranges from 0-300 PSI and 0-21 bar and includes a durable boot for protection. The set also includes: a small engine tester with an M43 (1-1/2") gauge with a dual scale dial that ranges from 0-200 PSI and 0-14 bar with M14/M18 threads, M14 separate flexible hose adapter with short thread, M14 separate flexible hose adapter with long thread, M12/M16 flexible hose adapter, M10 solid adapter, 8-inch extension tube, 24-inch extension hose, and repair parts kit. Neatly arranged in a plastic box with compartments for all parts.