GR300 mesh has a raised surface finish. GR300 is a lighter more open grade of our heavier exanded meshes, slighly heavier that Walkway, but not as heavy or as costly as GM450 or GM575.
The LWM (Long way mesh) is across the sheet while the SWL (Short way length) is along the length of the sheet. Thickness is the thickness of the sheet being used to cut the mesh from. The strand is the width of each slice.
For more specific detail about Gridmesh including loading specifications please follow this link to Gridmesh Technical.