A piston assembly includes first and second pistons, a transition arm coupled to each of the pistons, and a rotating member rotating in a first direction about a first axis. The system comprises a USB Master device and a USB Slave device. Embodiments of the present invention are applicable to a fax service in a packet-based network. The at least part of the page comprising a set of commands each one for submitting a next request on the client computing machine. The plasticizers being in sufficient amounts to achieve a gel rigidity of from about 20 gram Bloom to about 1,800 gram Bloom.