The 1591EF2GY is a light gray, flame retardant ABS enclosure in the 1591E size with an accessory flange attached to its bottom. Nominally 190 x 111 x 61 mm (7.48 x 4.37 x 2.40 in) per the series table, and 7.5 x 4.35 x 2.39 in (191 x 110 x 61 mm) per the part page, it offers room for larger boards with a built-in way to fix the box down.

It is molded from easy-to-machine flame retardant ABS rated UL94 V-0, so cutouts for connectors and switches are straightforward. The lid is secured by six nickel finish M3-0.5 x 10 mm machine screws into pre-installed brass inserts; the drawing recommends 35.5-42.5 ozf.in (25-30 cN.m).

• Overall length including bottom flange: 220.00 mm (8.661 in)
• Inside: 183.52 x 103.53 x 56.60 mm (7.225 x 4.076 x 2.228 in)
• Card guides for 1.5 mm (0.062") boards; guide height 51.60 mm
• Designed to meet IP54 with lap joint construction

The 1591EF2GY weighs 0.64 lbs (0.29 kg), ships shrink wrapped, and is RoHS and REACH compliant. It can be factory modified by milling, drilling or printing, and accessories include 1591Z card adaptors, 1599CLIPGY belt clips and the 1591EC clear lid.