․ For rear chain stay, dropout, and derailleur protection when you travel . Adjustable to fit different length of axles (130, 135, 160, and 165mm) . Patented
․ Product Dimensions : 16.2 x 14 x 2.5cm ․ Weight : 0.059kg ․ Color : Black, Orange ․ Material : ABS
I purchased it so that the frame dropouts remain in place when the wheels are removed while carrying the bike during travelling. Sturdy piece of plastic, can also be used while cleaning the drivetrain.