There is a sponge rubber seal with a flexible self-grip. The flexible self-grip seal has a sponge “bulb” profile that allows compression and is made from rubber with a metal internal insert.

Delta Rubber offers fast nationwide delivery

Postal fees are calculated based on the information provided. Don’t forget that most items remain in stock for speedy delivery. Ex-stock items normally be despatched within 1-2 working days or 3-5 working days (subject to selection), via next-day couriers within the mainland UK. Highlands and Islands will take approximately 48 hours as standard, but you can request a specific date if necessary – just let us know!