Chrome Trim Ring For 330mm Bulkheads - Polycarbonate

This Knightsbridge trim ring is a 330mm-diameter polycarbonate accessory finished in chrome, designed to upgrade the appearance of standard bulkhead light fittings. The ring clips or secures over the outer edge of a compatible bulkhead housing, adding a metallic accent rim that frames the opal diffuser and hides the junction between the fitting and the mounting surface.

Intended for both internal and external bulkhead installations where a more finished or contemporary look is required, the trim ring suits commercial lobbies, office corridors, residential porches and utility areas. The 60° projection describes the angle of the ring's outer edge relative to the mounting plane, allowing it to sit flush against walls or ceilings without creating sharp overhangs that collect dust or catch on passing fabric.

Polycarbonate construction gives the ring impact resistance superior to acrylic or glass alternatives, making it suitable for high-traffic areas, garages and external locations where accidental knocks are likely. The chrome finish is applied over the polycarbonate base and provides a reflective surface that pairs well with polished chrome door furniture, stainless steel fixtures and modern commercial interiors. The ring maintains access to the bulkhead's diffuser and lamp for maintenance without needing to be fully removed.

Product Specification Sheet

Which bulkheads is this trim ring compatible with?

The 330mm diameter suits Knightsbridge bulkhead fittings with a 330mm overall diameter or those designed to accept a 330mm accessory ring. Check the bulkhead's specification sheet to confirm compatibility before ordering.

Is the chrome finish suitable for outdoor use?

The polycarbonate base is impact-resistant and weather-resistant. The chrome finish is durable, but prolonged exposure to coastal salt air or industrial pollutants may cause surface dulling over time. For external installations, periodic cleaning with a soft cloth maintains the reflective finish.

Can the trim ring be fitted after the bulkhead is installed?

Yes. Most bulkhead designs allow the trim ring to be added or removed without dismounting the bulkhead from the wall or ceiling. The exact fitting method depends on the bulkhead model — some use clips, others use a screw ring or bayonet lock.

How is the chrome finish cleaned?

Wipe with a damp microfibre cloth and dry immediately to avoid water spots. For fingerprints or smudges, a glass cleaner or diluted washing-up liquid works well. Avoid abrasive pads or harsh solvents that can scratch or dull the chrome coating.