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White plastic 1-gang ceiling box extender 4.35-inch diameter 1.5-inch depth

iMBAPrice

iMBAPrice BE1R 1-Gang 4.35-Inch x 1.5-Inch Ceiling Box Extender video accessory

SKU CH-S05F-DX6X1

A 1.5-inch deep plastic extender fits 3.5 and 4-inch round or octagonal ceiling boxes and can be trimmed for shallow installations

  • Fits 3.5 and 4 inch round or octagonal boxes
  • 35 inch diameter matches standard ceiling openings
  • 5 inch depth adds wiring space behind fixtures
  • Trimmable plastic body adapts to shallow boxes or obstructions
  • White finish blends with typical ceiling surfaces

Ceiling Box Extender Compatibility

The iMBAPrice BE1R is a single-gang ceiling box extender designed for 3.5-inch and 4-inch round or octagonal electrical boxes. It provides additional depth when the existing box sits too far back behind the finished ceiling surface. Installers and DIY renovators use it to bring wiring devices flush with new drywall or plaster.

Plastic Construction and Trimmable Depth

The extender features white plastic construction that resists corrosion in ceiling cavities. Its 1.5-inch depth can be trimmed on site to suit shallower boxes or to clear obstructions such as joists or pipework. The non-metallic material eliminates grounding complications that metal extenders sometimes create.

4.35-Inch Diameter Fit and Device Support

The unit measures 4.35 inches in diameter, matching standard round and octagonal box openings. It accepts standard 1-gang device mounts for switches, receptacles or lighting fixtures. The extender frees up space inside the original box by moving the device outward, easing wire management during retrofit work.

How it compares

Measured against everything we stock in AV Accessories & Components, at today’s prices. Recalculated every night.

Price $3.99
Cheaper than about 95% of the 3,838 comparable items (median $41.99).

Specifications

Product
Brand nameiMBAPrice

Questions about this item

How do I install the iMBAPrice BE1R ceiling box extender and what step is often missed?

Fit the extender over the existing 3.5 or 4 inch round or octagonal box, then secure it with the original box screws; the step often missed is trimming the 1.5 inch deep plastic collar when the box is shallow or an obstruction prevents a flush fit.

What maintenance or replacement will the iMBAPrice BE1R extender need over time?

The white plastic body requires no routine maintenance; replace it only if the 4.35 inch diameter ring cracks from impact or if heat exposure makes the material brittle enough to break during a future fixture change.

What is the first limitation that appears when the iMBAPrice BE1R extender is used continuously with a heavy ceiling fixture?

The 1.5 inch extension depth adds leverage, so the original box screws and the plastic collar itself become the limiting factors — they can flex or strip before the ceiling joist or the box mounting reaches its capacity.

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