Box of 3 New Millipore Milligard 0.5 um Cartridge Filters (CWSC02S03). Filters are 20" (50 cm) long, diameter of 2.8" (7.1 cm). Pore size 0.5 um. Three new cartridges included in the listing. 30-day money back guarantee if product does not meet description in the listing. If there is anything wrong with the item that you have purchased, please contact us directly and give. us a chance to help, we respond quickly and will ensure you are satisfied with your purchase and experience!  Please do not leave negative feedback or open any disputes with eBay or PayPal. Contact us directly and we will fix the problem quickly. We strive for 5/5 Star service!   Fast & Free shipping!