Hello, we offer an essential article for the maintenance of your channels. The universal cleaner brush. We advise you to use a chain cleansing spray, then meticulously brush your chain to remove the old fat which takes care of impurity, and which is the first cause of premature wear of a chain. Once degreased, let the chain dry, then apply a chain fat, the best being after a short ballad when the chain heated, fat penetrates and fixes better. Specification: Material: Plastic + Synthetic fiber Length: 26cm / 10.24 inches