Unused. This filter uses 97% natural materials for filtering and adsorbing impurities in tap water. It's an eco-friendly cartridge with a low environmental impact during manufacturing and disposal. Compatible product model numbers: JF-1450SX(JW), JF-1450SX/SE(JW), JF-1450SXN(JW), JF-1450SXN/SE(JW), JF-1451SX(JW), JF-1451SX/SE(JW), JF-1451SXN(JW), JF-1451SXN/SE(JW), JF-1460SX(JW), JF-1460SXN(JW), JF-2430S(JW), JF-2432S(JW), JF-2432SN(JW), JF-2450SX(JW), JF-2450SXN(JW), JF-2450SXN/SA(JW), JF-2451SX(J) Using high-performance activated carbon, it achieves the industry's smallest compact size. This cartridge is easy to handle with the faucet body, easy to replace, and doesn't take up much storage space, making it a user-friendly cartridge. Thank you. (﹡ˆoˆ﹡) ✼••┈┈••✼••┈┈••✼••┈┈••✼••┈┈••✼ No. 154