Description
There are three types of expendables, Plastics buckles, Metal Surcingles (Clasps), or Rope lace line.
The plastics expendables is the most widely used because of easier to put-up, strength, and durability. The system is close with velcro flaps to make water tight connection.
The metal surcingles is an older style expandable and features easy installation. The drawback is the strength of the buckles and loosen easily.
The rope-lace line expandable system is strongest of the three. This harder to assemble system comes with two type of configurations – straight and (half and half).