The Neo-Pure CTOCL-4510 Coconut Shell Carbon Block Filter Cartridge specially designed using eco-friendly activated coconut shell carbon, which ensures the highest level of chlorine taste and odor, cyst, and lead reduction. Each block is wrapped with a polypropylene outer layer and netting to prevent premature clogging of the carbon block. Features: NSF Certified Materials.The Neo-Pure CTOCL-4510 Coconut Shell Carbon Block filter cartridge for chlorine reduction is made with NSF 42 approved materials. Eco-Friendly.Made from earth-friendly coconut shell carbon block, the Neo-Pure CTOCL-4510 is perfect for the earth-conscious consumer. Long Filter Life.With a filter life of 8,000 gallons @ 2 gpm, the Neo-Pure CTO1-4510 cartridge lasts much longer than most compatible filters. Sediment and Particulate Reduction.Polypropylene outer netting and layers provide superior sediment and particulate reduction. High Quality, High Value.This filter offers an economical and competitive price while providing exceptional performance and high capacity. Ideal for Many Applications. The CTO1-4510 is ideal for use as a reverse osmosis prefilter or postfilter. The filter media meets FDA/CFR Title 21 regulations for food and water contact, making them an excellent choice for residential, food service, and commercial drinking water applications. Superior Contaminant Reduction.The Neo-Pure CTO1-4510 cartridge is manufactured using coconut shell carbon for improved reduction of chlorine taste and odor, as well as cyst, lead, and turbidity. Additional Specifications: Cartridge Dimensions: 4.5" x 10" Operating Temperature: 35°F – 100°F (2°C – 38°C) Lead Capacity: 8,000 gals @ 2 gpm Maximum Flow: 3 gpm Nominal Micron Rating: 0.5 micron Initial Pressure Drop: < 7 psi @ 3 gpm WARNING: Do not use with water that is microbiologically unsafe or of unknown quality without adequate disinfection before or after the system.