This hybrid tongue and groove extrusion works perfectly with 6mm plywood panels.
It is made of 6063-T5 aluminium and is 1.25mm thick. Hybrid extrusions work just like traditional tongue and groove extrusion in producing a perfect seal between lid and base of the road case but achieving this with only one type of extrusion instead of 2 in a tongue and groove setup.

Verified owner andrew k. (verified owner) –