The Vitapur High Output Replacement Lamp GUVL-600H is designed specifically for the UV System VUV-H645B. This clear lamp has a sleek design with dimensions of 6 inches in height and 6 inches in width, making it easy to install and use. Made with high-quality materials, this lamp ensures long-lasting performance and efficient operation. With a manufacturer part number of GUVL-600H, this lamp is compatible with the Vitapur brand and is an ideal choice for maintaining the effectiveness of your UV system.