Cavity sleeves and extension accessories provide ventilation through external walls to the building interior. They should always be used with Timloc airbricks. They give an overall length of 365mm.

Cavity sleeve codes, sizes and purposes:

• 1202/1 – 9 x 3” cavity sleeve to suit single airbrick

• 1202/2 – 9 x 6” cavity sleeve to suit two stackedairbricks

• 1236 – Extension sleeve for 9 x 6” cavity sleeve to be used between airbrick and front of vent to provide effective additional extension of 90mm

• 1237 – Extension sleeve for 9 x 3” cavity sleeve to provide effective extension of 90mm

• 1238 - 9 x 3” baffle to suit 1202/1 and 1202/2 (2no required)