Our split Modular Metal Doorframes are made from 1.2mm Galvanneal. The frames come in 2 separate fully welded sections, which are strapped together for transport. When unpacked you simply place on either side of the wall and push together until it stops. The split frame is already square, so you simply then need to screw to the wall and fill in the holes. The split frame is available in all standard sizes (620mm - 920mm x 2040mm in height) and can also be made to suit special sizes. Special size frames will require a lead time of between 5-8 days.The door frames are flexible to work with a 85mm -125mm back opening.