Selfcontained, mechanical chain cleaner system \n Innovative quicklock closure and dragfree derailleur hook for easy use and handsfree operation \n Designed for efficient cleaning and degreaser usage. Uses 1 floz (30ml) of degreaser per cleaning \n PD1800 Pig Pen includes everything you need, Chain Pig, gear brush, 4oz Pig Juice degreaser, and 4oz ChainJ chain lube