These are used to haul video tripods by air, they only open at one end, but that end can be adjusted in a 5-inch range up and down. The prices looked good. you can find more of the same in even larger sizes at www.markertek.com
Example: http://www.markertek.com/SearchProduct.asp?item=BFC291&off=0&sort=prod&s kuonly=1&search=BFC295&pagesize=20 ************** Create a Home Theater Like the Pros. Watch the video on AOL Home. (http://home.aol.com/diy/home-improvement-eric-stromer?video=15?ncid=aolhom00030000000001)
