Carwash specifications depend on the type of carwash, but common metrics include pressure (\(110-3800\) PSI), flow rate (\(1.5-10\) L/min or GPM), motor/engine power (\(5-8\) HP), and detergent tank capacity (16 L). Key equipment includes high-pressure washers, foam cannons, brushes, and water filtration systems, with features like touchscreens and customizable wash programs for advanced systems.