Park Tool Chain Brite removes the toughest grease and grime buildup from chains and components and leaves a light, protective silicone shield. Although Chain Brite is a powerful cleaner, it will not harm alloy, plastic, or painted parts. Regular use of Chain Brite (along with regular use of a quality chain lubricant) will reduce gear system wear and friction and promote smoother, quicker shifting. A handy flip-top lid on the 16 oz. (474ml) bottle makes spill free pouring easy.