Johnsons Automatic Toilet Cleaner Block Comes In A Pack Of Four 50G Blocks, Providing 200G In Total. Designed For Use With Compatible Toilet Systems, The Blocks Help Maintain Toilet Freshness Between Regular Cleanings. The Automatic-Cleaner Format Is Intended To Release Cleaning Or Fragrance Components During Use, Depending On The Product Formulation. The Four-Pack Provides Replacements For Continued Household Bathroom Maintenance. Follow The Label For Correct Placement And Compatibility With The Toilet System.