Extension Box 4X4 PVC

Material: Usually PVC (polyvinyl chloride) — nonconductive, corrosion-resistant, light weight.

Standard dimensions: Face size ~ 4 in × 4 in (≈ 100 mm × 100 mm or local equivalent); depth varies (e.g. ~ 25–50 mm)

Knock-outs / conduit entry points: Many versions include pre-scored knock-outs (KO’s) on sides for conduits / cable glands.

Mounting style: Can be flush mounted in wall, or surface mount version where box is exposed.

Cover / lid: Detachable cover or lid to access wires inside, often with screw fixings.

Cable / wire accommodation: Space for splicing, looping, wiring devices (switches, sockets).

Compliance / standards: For certain markets, boxes must comply with local electrical standards (e.g. SABS in South Africa).

Durability: PVC resists corrosion, moisture; suitable for indoor and in many cases semi‐outdoor use (protected from direct sun / elements).

Insulation & safety: Nonconductive walls reduce risk of accidental shorting; also provides mechanical protection for connections.