A complete maintenance kit for both MiniWorks and WaterWorks microfilters. 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 Specs Weight (Standard): 1.1 oz Weight (Metric): 0.03 kg Width (Standard): 1.8 in Width (Metric): 4.5 cm Length (Standard): 3.3 in Length (Metric): 8 cm Height (Standard): 1 in Country of Origin: Made in Seattle, USA