The present invention provides for an improved guide to be used in assembly of various types of window treatments, including roman and hobble shades. The tire apparatus allows the vehicle to be driven during periods of both low tire pressure and normal tire pressure. Preferably the composition comprises -chloroquine diphosphate. The carrier candidate list is used to permit units to determine which carrier they should switch to when the carrier there currently operating on is determined to have unacceptable performance. A second substrate includes a shield layer arranged outside the active area. In particular, collapsible staple drivers may be supported within the cartridge for driving a staple or staples supported thereon into forming contact with an underside of an anvil attached to the instrument.