Unique-Bargains
Unique-Bargains 11pcs Plastic Junction Box 40x20x11mm Conduit
Eleven waterproof black plastic junction boxes measuring 40 by 20 by 11 millimetres for protecting electrical connections
- TypeHI - Conduit & Fittings
- Compact 40 x 20 x 11 mm enclosure fits tight spaces
- Waterproof sealed design protects electronics in harsh environments
- Anti-corrosion plastic withstands adverse conditions
- Customisable with drilling, painting or silk-screen printing
- 11-piece pack weighing only 45 g total
11-piece plastic junction box kit
This set supplies eleven black plastic enclosures sized at 40 x 20 x 11 mm for protecting small electrical connections. Each box weighs roughly four grams, giving a total pack weight of 45 g. The sealed design aims to keep moisture and corrosion away from sensitive components in harsh environments. Hobbyists and installers can use them for automotive wiring, sensor housings or low-voltage project enclosures.
Sustained environmental protection
The waterproof seal is intended to maintain its barrier during continuous exposure to damp or corrosive conditions rather than only brief splashes. The rigid plastic shell resists degradation so the internal instruments stay shielded over long service periods. No active cooling or moving parts are involved, so reliability depends on the seal integrity and material stability. The enclosures remain passive protective shells throughout their operating life.
Upgrade from open terminal strips
This kit replaces unsealed terminal strips or improvised boxes that offer no ingress protection. The jump is worth it when wiring must survive persistent moisture, dust or chemical vapour without additional potting. Builders who need larger internal volume, metal shielding or pre-drilled cable glands will not find those features here. The boxes arrive solid, requiring any holes or cut-outs to be made by the user.
Highlights
- Compact 40 x 20 x 11 mm enclosure fits tight spaces
- Waterproof sealed design protects electronics in harsh environments
- Anti-corrosion plastic withstands adverse conditions
- Customisable with drilling, painting or silk-screen printing
- 11-piece pack weighing only 45 g total
Specifications
| Brand | Unique Bargains |
|---|---|
| Type | HI - Conduit & Fittings |
Questions about this item
How much heat does the 40 x 20 x 11 mm junction box dissipate when cables run through it all day?
The sealed plastic enclosure has no active cooling; heat dissipation depends on the cable load and ambient temperature inside the 1.6 x 0.8 x 0.4 in housing.
What mounting hardware or conduit fittings must I already own to install these 11 boxes?
The boxes ship as bare enclosures; you need compatible conduit entries, cable glands or drilled entries plus screws or adhesive for surface mounting.
Will the 45 g black boxes fit alongside legacy 20 mm conduit runs I am keeping?
Each box measures 20 mm wide, matching standard 20 mm conduit, so they align with existing runs without adapters.
Also in this aisle
People compared these
Same shelf, same checkout — eight coins and a 30-minute rate lock.



