Total Net Wt. 3.5 oz (100 g) containing 1.25 oz (35 g) bleach tablet. Kills 99.9% of bacteria! Continuous cleaning action. Deodorizes. 2-tablet system. Concentrated to clean up to 4 months. Powerful blue detergents clean and deodorize. Bleaches away stains. Freshens with every flush. Not harmful to plumbing or septic systems when used as directed. www.wd40company.com. Please recycle. Made in USA.