3M Professional P6 Toilet Bowl Cleaner, Cleaning High Viscosity for Toilet Bowl, Urinate Bowl, All Ceramic Surface, Fast & Easy Application, Clean & Sanitize with Refreshing Fragrance (5L, Pack of 1) :
Amazon.com: Zep Acidic Toilet Bowl Cleaner 32 oz ZUATB32 (Pack of 2) - Thick pro formula clings to tough stains : Health & Household
Amazon.com: 3M Heavy Duty Acid Bowl Cleaner, Ready-to-Use, 1 Quart, 12/Case : Health & Household
3M Professional P6 Toilet Bowl Cleaner, Cleaning High Viscosity for Toilet Bowl, Urinate Bowl, All Ceramic Surface, Fast & Easy Application, Clean & Sanitize with Refreshing Fragrance (5L, Pack of 1) :
3M Scotch-Brite 15 In. Toilet Bowl Brush Set - Taylor's Do it Center
Diversey Crew Clinging 12-Pack 32-fl oz Floral Toilet Bowl Cleaner in the Toilet Bowl Cleaners department at Lowes.com