Originally Posted by jchang10
Also, available from van's. I just ordered some the other day.
MS21266-1N 12" long edge grommet
...protection are being discussed here, and not identified well...
The link above is to the more usual, and cheaper, edge protection that looks like a u channel with slits cut in the side. It is a single plastic (or nylon or polyethelene) extrusion/molding.
The Aircraft Spruce link (post #2) above is much more expensive due to a very different construction method. As described at Aircraft Spruce...
The product is a composite of polymer encapsulated spring stainless steel enhanced by a protective cushion.
It will grip the edges of the metal and will flex in a much tighter radius.
This spec. sheet has better visuals than AC Spruce...
I find the cheaper "catapillar" plastic ones (in nylon) work fine on large lightening holes, etc. - but if you want edge protection on a portion of a straight edge, or are dealing with complex cut out shapes, then nothing can beat the more expensive AC Spruce product.
They are vastly different products that perform similar functions.