Packed in a small plastic case, the MSR Guardian Portable Water Purifier Maintenance Kit is small enough to take into the field on long or short trips. Includes instructions, pressure-relief valve, relief-valve O-ring, piston O-ring, end-nut O-ring, piston-cup seal, umbrella valve, clean side cover and MSR food-grade silicone lubricant. 3.25L x 1.75W x .75H. Wt: 1.1 oz. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Maintenance Kits.
