Free Air: 46cm² Louvred airbricks
BM483/1 Blue/Black
BM483/2 Terracotta
BM483/3 Rustic red
BM483/4 Buff/Sand
BM483/5 Rustic brown
Size: 216 x 76mm
Complies with BS 493 1994. Fits both imperial and metric brickwork
Free area space greatly exceeds conventional clay airbricks with choice of clay brick matching colours.
Lightweight but tough. Ribbed for mortar key, with rough cast brick finish.
Fits into BM425 & BM433 liners