The 1556FPL is a square aluminum inner panel sized for the 160 x 160 mm 1556F and 1556FA enclosures. At 142 x 142 x 2 mm (5.6 x 5.6 x 0.08 in), it gives builders a removable mounting plate that can be drilled and populated outside the enclosure, then dropped in as a finished sub-assembly.

According to the series ordering table, the 1556FPL fits both the 45 mm tall 1556FBK, 1556FGY, 1556FWH and the 70 mm tall 1556FABK, 1556FAGY, 1556FAWH enclosures, so one panel covers either height and every color in the 1556F footprint.

The drawing gives overall dimensions of 142.00 mm [5.59 in] x 142.00 mm [5.59 in] with a thickness of 2.05 mm [0.08 in], a 2.00 x 45.0 degree chamfer and R8.00 mm [R0.31 in] corners. The part page lists the colour as natural aluminum and a shipping weight of 0.24 lbs (0.11 kg); the panel ships in shrink wrap.

The 1556 Series specification sheet notes that multiple mounting locations inside the lid and base of the enclosure allow easy PC board mounting or use with the aluminum panels, which are sold separately as accessories. The panel is REACH and RoHS compliant, and the drawing notes that factory modification such as milling, drilling and printing can be quoted, with solid models available in .stp or .x_t.