Specifications

1) Size - 3 Inch  X 3 Inch  X 35 MM (1 GANG EXTENSION – 35 MM Deep).
2) Easy to break open 20 & 25 mm knockouts each on 2 sides, 25 mm 2 knockout     on 3rd side, 20 mm 2 knockout on 4th side. Used as an extension box to the     Junction box of 35 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 1.10 mm.
7) Made from G.I. material with minimum coating of 100-120 gsm.
8) Quality as per British Standards BS 4662.