Leading Edge bladders are sold with no valves attached unless otherwise specified. Bladders are sold by length and measured from tip to tip
Airtime bladders are made of a single piece of plastic and have only one welded seem running the length of the bladder
Bladders will almost always have a larger diameter than the bladder you are replacing. This is by design. Oversized bladders never fully expand inside the sewn sleeve, reducing stress on the plastic