This is a genuine VIQUA QS-463 UV Quartz Sleeve, designed to fit S5Q-PA and SSM-24 systems. The sleeve is a replacement part, suitable for use in water filtration systems. The brand is VIQUA, and the model is QS-463. The sleeve is compatible with the aforementioned models and is made from high-quality materials. It is suitable for use in various plumbing and fixtures applications, including water filtration systems. This product is perfect for those looking to replace a damaged or worn-out sleeve in their VIQUA S5Q-PA or SSM-24 system.