Multi Reel Holder: Low profile clamp-on desktop spool holder supports multiple reels of different sizes directly behind or beside a 3D printer, keeping all the filaments needed for your print job ready and waiting Holding Capacity: Fits up to eight standard 1kg reels, four 3kg reels, or two 5kg reels, giving you options for organizing supplies. Steel construction supports weight up to 22 lbs and is durable and scratch-resistant