Outdoor Water Solutions OPR0046 Windmill Maintenance Kit Kit contains 1 replacement diaphragm, 2 umbrella valves, 1 red fiber washer and 1 o ring Compatible with any outdoor water solutions wind driven aeration system or aermaster electric aerator High quality components OPR0046 Kit contains 1 replacement diaphragm, 2 umbrella valves, 1 red fiber washer and 1 o ring Compatible with any outdoor water solutions wind driven aeration system or aermaster electric aerator High quality components