Comes with gauge, coupling kit, wall mount, coupling, hose kit , and NIP. Productivity kits help boost performance, extend the life of the tool, and ensure minimum pressure drop. Each productivity kit includes a ball valve, air preparation unit and couplings, and hose and **s needed for the correct and safe installation of the tool. Just choose the correct productivity kit based on the airflow requirement of the tool and whether or not the tool needs lubrication. You’ll be surprised how much the productivity kit improves the performance of the tool!