The PCJ181610L is a Type 4X polycarbonate junction box with a solid light gray polycarbonate cover, sized at an 18 x 16 in face and 10 in nominal depth. It is built to insulate and protect controls and components indoors or outdoors, for pump controls, waste water, irrigation, solar/wind and chemical plants.

The box and cover are injection moulded polycarbonate thermoplastic that is easily punched, cut or drilled, with enhanced UV inhibitors against outdoor weathering (UV rating f1 per UL746C). The cover closes with two 316 stainless steel lockable snap latches, and the snap latches include a provision for padlocking. The matching polycarbonate cover is solid, with the light gray finish of the polycarbonate material. A captive, oil resistant FIP polyurethane gasket provides a positive seal. The molded hinge uses four snap-in polycarbonate hinge knuckles. Wall thickness is .19 in (4.8 mm).

Nominal size is 18 in x 16 in x 10 in (457 mm x 406 mm x 254 mm); the enclosure measures 18.04 in (458 mm) high, 16.04 in (407 mm) wide and 9.81 in (249 mm) deep, with a shipping weight of 10 lbs (4.54 kg). Threaded #10-32 brass inserts are provided for mounting the optional P1868 inner panel, which measures 16.88 in (429 mm) by 14.88 in (378 mm). The drawing lists optional back panel thicknesses of 0.100 in (2.54 mm) aluminum, 0.075 in (1.91 mm) white steel or 0.188 in (4.78 mm) PVC.

It ships with four polycarbonate feet for surface mounting; the drawing calls out 4X .32 in (8.2 mm) mounting holes. Stainless steel 316 screw fasteners are used and mounting hardware is included. The solid-cover PCJ181610L is UL 508A and cUL (CSA 22.2 No. 94) Type 1, 2, 3, 3R, 4, 4X, 12 and 13, meets the same NEMA types and IP66, is V-0 per UL 94, and is RoHS and REACH compliant. Operating temperatures run from -35 °C to 130 °C (-31 °F to 266 °F), with an impact index of 16 J (12 ft/lb).