Check the listing for details. TAC Scale Prevention Replacement MEDIA for Sentry Salt free Softener Systems. Color: White, Condition: New. Listed at 155.00 USD. Sold by the liter, add additional qty to cart for amount that you need. The scale prevention media is very light, it only takes 3 liters for the standard size unit, 4.5 for the high flow unit. Weight is approximately than 1.475 pounds per liter. The scale prevention media is the highest quality media for no salt softeners, scale prevention filter systems. 1 liter scale prevention mediaReplacement filter media for salt free, no salt softener systemsStandard units uses 3 liters, order 3 items of this in the qty boxContact us for questions or custom configurationsMedia will last 5-8 years, easy to replace or add to existing tank Model #: SFMEDIA1L Premier Water Systems661 575 00337623 Fulton AveNorth Hollywood, CA 91605 Track Page Views WithAuctiva's FREE Counter