These are replacements for the stock style 9 double pleats door panels. R&L means you get both door panels right and left sides.
some vendors sell the "skins" only that you can install yourself for $109.95 + shipping or complete panels for $179.95 .
http://www.manestruckparts.com/store...&Category_ID=7
http://www.classicparts.com/1967-68-.../#.Vsgw4UbVV3w
These are sewn not heat pressed and you save $100.00 over store prices.