Visit our delivery page for pricing relevant to your location.


Triple Plaster Trim
3mm 35661
In stock. Fast dispatch and delivery.
Triple Plaster Trim
3mm 35661
In stock. Fast dispatch and delivery.
Add this trim to your triple Corston back box so you can plaster it into the wall. It’s the best way to get a perfect finish and the switch or socket plate sitting exactly flush.
It raises the box 3mm away from the wall for skimming (use our 9mm trim for thicker rendering).
- Made from recycled and recyclable post-consumer plastic
- Fire retardant
Delivery information + -
FAQs + -
How do I install Corston electrical products? + -
How do I install Corston Clear Switches and Sockets? + -
Do I need to use Corston back boxes for your electrical products? + -
Can I create a custom switch arrangement? + -
How do your retractive switches work? + -
When should I use an intermediate switch? + -
Can I have more than one two-way dimmer controlling the same circuit? + -
How do I stop my dimmers from flickering? + -
Are your products suitable for use outside of the UK? + -
In stock. Fast dispatch and delivery.
Delivery information + -
FAQs + -
Installation and PDFs + -
Visit our delivery page for pricing relevant to your location.
How do I install Corston electrical products? + -
How do I install Corston Clear Switches and Sockets? + -
Do I need to use Corston back boxes for your electrical products? + -
Can I create a custom switch arrangement? + -
How do your retractive switches work? + -
When should I use an intermediate switch? + -
Can I have more than one two-way dimmer controlling the same circuit? + -
How do I stop my dimmers from flickering? + -
Are your products suitable for use outside of the UK? + -