Easy to use maintenance kit for the MSR Miniworks and Waterworks microfilters. MSR says A complete maintenance kit for both MiniWorks and WaterWorks microfilters. Our VerdictComprehensive kit along with other spares. – Reviewed by Ultralight Outdoor GearFeatures Includes: Instructions, O-ring for Lower End cap, O-ring for Filter Housing, Inlet Filter, Silicon lubricant for O-rings, O-ring for Relief Valve, O-rings for Piston, Duck Bill Valve, Washer, Umbrella Valve WARRANTY | This item comes with a product lifetime warranty. For more information see the MSR website. Specifications Weight: 34g Width: 4.5 cm Length: 8cm

Easy to use maintenance kit for the MSR Miniworks and Waterworks microfilters. MSR says A complete maintenance kit for both MiniWorks and WaterWorks microfilters. Our VerdictComprehensive kit along with other spares. –