Yakima bar end cap with tie-down loop

I've always disliked the stock end caps that come with all Yakima roof rack cross-bars. This design fit the bill of a beefier end-cap while providing a handy loop to hook anything to (bungee cord, rope etc). I was amazed at how strong these are and VERY difficult to get off once you smack them on! They are 5.5cm x 3.5cm x 2.5cm tall (when on the build platform) with nicely rounded edges, especially on the loop so as not to fray any tie-down materials (which made for more complicated polygons an