Effetto Mariposa Cog Brush-For Chain & CogsFeatures Specifically designed to remove mud and dirt from chain and sprockets Equipped with two sets of bristles: lateral, with shorter and denser bristles, for chain, chainring and cogs; at the tip, with longer and harder bristles, to reach the dirt in the cassette The curved and thin handle can be slipped between the cogs and act against the mud deposited in the cassette (up to 10 speeds), thanks to the teeth in the lower part Made of nylon,