The 1591EC is a clear polycarbonate lid, sold as a lid only (no box or screws), and is the clear lid accessory listed for the 1591E size in the 1591 Series ordering tables. It lets designers and integrators see LEDs, displays or boards inside a 1591E enclosure without opening it.

The lid measures 7.5 x 4.35 x 0.23 in (191 x 110 x 6 mm). It is molded from flame retardant polycarbonate with a UL94 V-0 flame rating, and the part page lists an IP54 rating. It is RoHS and REACH compliant. For a fully transparent enclosure rather than a clear lid, the series copy points to the polycarbonate 1591T series.

The series tables list 1591EC against the 1591E enclosures, nominally 190 x 111 x 61 mm (7.48 x 4.37 x 2.40 in): 1591EBK, 1591EGY, 1591ESBK and 1591ESGY without flanges, plus the flanged 1591EFLBK, 1591EFLGY, 1591ESFLBK, 1591EF2BK, 1591EF2GY, 1591EF2SBK and 1591EF2SGY.

The 1591EC ships shrink wrapped with a shipping weight of 0.14 lbs (0.06 kg). Some chemicals can damage or weaken plastic, so avoid acetone, ketones, strong solvents and thread-locking compounds and use plastic-safe cleaners. Chemical exposure can also be affected by concentration, time in contact, temperature and external stresses.