Rated #1 By Consumers! Formula 420 is the fastest, easiest & most effective cleaner on the market. For those of you who demand an all natural product, Formula 420 proudly presents their All Natural Cleaner. Naturally, the best way to clean your piece! Size: 12 oz Hassle Free and Easy to Use Earth Friendly and Biodegradable For Materials: Glass, Metal, Ceramics Warnings: Not for use with PLASTIC or ACRYLIC