The RP1120 from Hammond Manufacturing is a plastic box made of white polycarbonate with the cover included, measuring 4.940" L x 3.370" W (125.48 mm x 85.60 mm) with a height of 1.570" (39.88 mm).
The RP1120BF from Hammond Manufacturing is a white polycarbonate plastic box measuring 6.140" L x 3.420" W (155.96 mm x 86.87 mm) with a depth of 1.570" (39.88 mm), with cover included.