Pine or plywood 1x4s are preferred over OSB for their stability and ability to hold screws without splintering.
The grid usually attaches to an inflatable softbox or a rigid frame using heavy-duty touch fasteners. Grid 1x4
These grids provide precise light control by narrowing the beam angle (typically 40 degrees) and reducing light spill. Pine or plywood 1x4s are preferred over OSB
The "1x4" refers to the dimensions (1 foot by 4 feet) of professional LED mat systems. Grid 1x4