Alphalite is a lightweight, high strength, fire & acoustic-tested material.
Masonry units are manufactured in 90; 110; 140; 190 and 290mm thicknesses. The face size of the full units is 190 x 390mm.

It is common for concrete masonry blocks to be described in their nominal sizes; the face size being 200 x 400mm when laid in 10mm mortar joints.