28mm Flange Kit

The duckbill valves and silicone diaphragms fit perfectly into my pump, and the whole kit feels sturdy right out of the box. Swapping them out took me less than two minutes, and the suction is just as strong as the day I got it.

Finally got these to fit properly after watching a quick video—the silicone diaphragms are much sturdier than the ones I had before. The duckbill valves create a good seal, though I wish the assembly instructions were a bit clearer.