Filament storage for Member's Mark wire rack

This frame holds two rolls of filament and clips on to Member's Mark 6-Tier Heavy Duty Wire Shelving, 47.75" W x 18" D x 75.5" H - Sam's Club (samsclub.com)

This may fit other wire shelves. The distance between the top of the upper bar and top of the lower is 22mm, and the diameter of each bar is around 6.2mm. 

PLA worked well for me, but PETG seemed less rigid and it sagged a bit under the weight of two full spools. I included two lengths of crossbar, one for a single spool and one that holds two spools.

v2 is a thicker, stronger version I created after using the originals for about 6 months. Holding two spools at once, they did sag noticeably over time and I'm hoping the v2 version will hold up better.