| Specification Attribute | Technical Detail |
| Brand | Anchor |
| Product Code | 21780 |
| Generic / Common Name | GI Boxes (Concealed Galvanised Metal Boxes) |
| Modular Capacity | 1 Module (1M) or 2 Module (2M) |
| Material | Heavy-Gauge Galvanised Iron (GI) |
| Protective Coating | 120 GSM Zinc Galvanisation |
| Dimensions (Box Envelope - L x B x D) | 79 x 75 x 46 mm |
| Packaged Dimensions (L x B x H) | 10.0 x 5.0 x 5.0 cm |
| Product Weight | 0.1 kg |
| Internal Depth | 46 mm |
| Unit Packaging | 1 Piece |
| Earthing Provision | Integrated Dedicated Earth Terminal Screw |
| Mounting Style | Concealed In-Wall Flush Mount (Brick, Concrete, Drywall) |
| Target Applications | Residential Buildings, Commercial Offices, Hotels & Hospitals |
| Best Used For | Rough-in Housing for 1M/2M Switches, Sockets, USBs & Motor Starters |
120 GSM Zinc Galvanised Protection: Engineered with a heavy 120 GSM zinc barrier that provides defense against corrosion, concrete alkalinity, and wall moisture for an extended service life.
Dual 1-Module & 2-Module Versatility: Designed to fit standard 1M and 2M Anchor Penta Modular and Roma Urban grid mounting plates, accommodating switches, sockets, USB ports, and motor starters.
Deep 46 mm Internal Wiring Depth: Features a 79 x 75 mm footprint with a 46 mm internal profile, delivering ample cavity space for clean wire looping, heavy conductors, and deep-profile modular mechanisms.
Dedicated Low-Resistance Earthing Terminal: Equipped with a built-in brass/metal grounding screw to ensure positive fault-current discharge, helping protect personnel and connected equipment from electrical shocks.
High-Precision Threaded Lugs & Knockouts: Incorporates robust, factory-tapped threaded mounting lugs for secure faceplate fastening alongside smooth conduit knockouts for rapid pipe entry.