An easy-to-use line cleaning tool in the field.Soak the four ruby cells inside with a fly line cleaner such as CFA-111 Shooting Liquid, and attach near the butt of the rod.Fold rods and fly line with main body , 4 magnets inside will hold rod and line stable, then wind fly reel.The four ruby cells can be removed and washed, so you can use them in a clean state many times. Weight: 21 g