Pro Products Poly Guard® Cartridge - Prevent Hard Water Rust; Scale & Rust Preventer GE Desal (1206719) AG-Series Tap Water/Brackish RO Elements AG2521TF; 2.5" X 21" 300 GPD TFC; TAPE Commonly used as a post-filter

Commonly used as a post-filter for reverse osmosis systems or as a standalone filter

Fits standard 10-inch Big Blue cartridges

Fits Standard Residential RO Systems

Why Choose the E5655

01 pH precision at 25°C for reliable calibration you can document

Pro Products Poly Guard® Cartridge - Prevent Hard Water Rust; Scale & Rust Preventer GE Desal (1206719) AG-Series Tap Water/Brackish RO Elements AG2521TF; 2.5" X 21" 300 GPD TFC; TAPE Commonly used as a post-filterThe Pro Products Poly Guard Cartridge (GP10C) delivers triple action protection against scale, corrosion, and rust staining in whole house water systems. This NSF certified cartridge uses food grade polyphosphate crystals to treat up to 30,000 gallons, protecting plumbing and appliances while reducing heavy metal leaching. SPECIFICATIONS Pro Products GP10C Poly Guard Technical Details Model Number Pro Products GP10C Poly Guard Crystal Cartridge