4-Stage NSF-Certified Filtration Independently tested and certified by NSF International to NSF/ANSI 401, 53, 42, and 272, delivering reliable contaminant reduction while improving water taste and odor. Premium Coconut Shell Carbon Block Made with 100% Sri Lankan coconut shell carbon, featuring a high-density microporous structure for effective filtration and great-tasting water. Precise Fit, Leak-Free Design Engineered for a secure, exact fit with easy, tool-free installation. Designed to prevent leaks while maintaining consistent water flow. Wide Model Compatibility Compatible replacement for LG LT700P / ADQ36006101 and select LG & Kenmore refrigerator models (see product description for full compatibility list). Safe, Lead-Free Materials Constructed with BPA-free, food-grade materials and certified to NSF/ANSI 372 standards for lead-free compliance.