Note: Due to product packaging upgrade, you may receive the product in a different package. The product has the same effect and this product is 2PACKS. Please refer to the corresponding pictures for the applicable model of the product. Easy installation & Efficacy: No tools required! It is quick and easy to replace, just taking several seconds. By leaving potentially healthy and beneficial minerals, while removing various impurities, provide you and your family with healthier and fresher water. For optimum performance, it is recommended for you to replace every 6 month or 300 gallon. Compatible models: Compatible with EDR2RXD1, W10238154, W10413645A, 46-9082. The listed model numbers are just for reference purpose. High-quality Material: Uses high-grade natural coconut shell activated carbon block as material, which features better adsorptive ability and better performance with microscopic pores. Authoritative Certification - Certified and tested to NSF/ANSI 42 standard to reduce chlorine, odor and retain beneficial minerals in your.