Boig & Hill is a distributor of pneumatic valves, controls, and related instruments, and carries products by Everlasting, Worcester Controls, Watson McDaniel, Trerice, Farris Engineering, and Sprague Pump. Everlasting's valves come in five different series, including the 4060 and 4061 Series that can be installed with a hand wheel in any position and offers a self-wiping seal disc, and the 6000 Series, which is an outside screw and yoke type.