Hydrofarm Active Air Stainless Steel

liked the SS. worked well on my 8" vent hose. Dont know actual strap length but its over 8"...so easy to wrap around hose, insert end and tighten. Nice product. Incidentally...they come in a baggy and you will want to straiten out before use. Rub back of the clamp strap over the edge of a board or similar to get the bend to conform to your requirement. its very easy. don't go wild...steady as go!!

I ordered the 8 inch. Decent build quality, definitely not cheap. I used these for my scuba tank, I'm not sure if it's just proof like they claim. I needed a clamp for a 7 1/2 inch tank the 8 inch just bearaly fit tight. I recommend you use a build a clamp kit so you can cut it to what you need.

I bought this set of 2 clamps to replace a set of clamps for my 4" dryer vent that were very poorly designed. They only tightened to exactly 4 inches (actually a little less, which is why we had the problem). These continue to tighten as the end of the clamp is pulled through by the turning of the bolt. The bolt is a hex shape with flat head screwdriver option also. Simple, works as advertised.

This holds my fan and hose together perfectly. Very strong.

Pro: Good quality and easy to install. Con: I have looked every where to find a 7" duct clamp. I cannot find a 7" duct clamp. I thought I could buy the 8" duct clamp and tighten it to 7". Mine closed to 7-1/2". Very disappointed. So I used a spacer to make up the difference until I can find a 7" clamp. There has to be somewhere I can go to order a clamp to fit this duct without special ordering it.