Specifications

1) Size - 3 Inch  X 3 Inch  X 25 MM (1 GANG EXTENSION – 25 MM Deep).
2) Easy to break open 20 mm knockouts 2 each on all 4 sides. Used as an     extension box to the Junction box of 25 mm deep in case dept is required for     switch plate to be fitted
3) 1 Adjustable lugs for easy mounting of switch plate.
4) Earthing both option of washer-screw brass rivet available as required.
5) All sides are joined with internationally accepted interlocking style with each     other
6) Available in thickness from 0.70 to 1.00 mm.
7) Made from G.I. material with minimum coating of 100-120 gsm.
8) Quality as per British Standards BS 4661.