The dual display pressure gauge head has a clear scale, making it easy to read, and the 10 adapters included are marked with numbers for convenient selection. The dual display pressure gauge head has a clear scale, making it easy to read, and the complete set of accessories, including 10 adapters, a 4FT long oil-resistant hose, and brass fittings, make it suitable for most gasoline and small diesel engine cars, motorcycles, boats and other vehicles.