The Exitex Internal Letterbox is a quick and effective solution for improving insulation and reducing energy loss. Designed for easy installation, it can be fitted in just 5 minutes and helps reduce heat loss by up to 35%. Built for durability and performance, this product comes with a 5-year guarantee, making it a reliable choice for enhancing comfort and energy efficiency in your home.

• Fit it in 5 minutes
• Up to 35% less heat loss
• 5 year gaurantee