Omnipure -- ELF XL 1ML - 15" x 4" ELF XL-Series 1 Micron Carbon Block Filter; Cyst & Lead ReductionOmnipure ELF XL Series 15" x 4" ELF XL 1ML Carbon Block Filter Extra large format 1 micron carbon block engineered for commercial food service applications requiring lead and cyst reduction at high flow rates 1 Micron Lead Reduction Cyst Reduction 15" x 4" Diameter WHY IT WORKS Commercial grade filtration for demanding applications 1 Micron Carbon Block Dense activated carbon block removes lead, cysts, chlorine, taste and odor while maintaining