Dirt is your bike's mortal enemy. Premature wear and tear from abrasive particles trash your expensive components. To keep your bike running long and smooth, use Hardcore Chain & Gear Cleaner. It destroys caked-on oil, grease, dirt and grime. Chain & Gear is safe for people and bikes. Don't throw away your hard-earned money shipping water! Chain & Gear Cleaner concentrate refill saves you money & a little piece of mother earth. Shipping water is a waste & Hardcore is doing it's best to help out. Once you've ordered the starter kit, you can save yourself some money and help reduce plastic waste by simply ordering the refill concentrate (WO-937N-J2HN) !