So, it took a while to source this product. We saw one at the boat show
& thought it looked like a great idea in the case of a seacock breaking off in your hand. Today the special order 2" item arrived at our chandlery
& we examined it closely. It seemed considerably different than the demo version we saw at the boat show
in that the zip portion was really quite short--perhaps only 4" long. We compared it to a thru hull
in the store & decided it would not be long enough to reach through to the outside hull
& thus allow one to seal the hole. Great idea, but we thought they cheaped out on the length of the zip portion and thereby rendered it of no value for a seacock failure.
We decided against buying