Packed in a small plastic case, the MSR Miniworks Microfilter Maintenance Kit is small enough to take into the field on long or short trips. Includes O-rings, inlet foam, inlet valve, outlet cap and silicone lubricant. Made in USA. 3.3L x 1.8W. Wt: 1.1 oz. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Maintenance Kits.