A sheet identification device includes plural detecting units, an estimating unit, and an output unit. The needle contains a deployable snare that is used to pass and retrieve suture. When exposed to water, the polymer degrades through hydrolysis. The RF power amplifier circuits are respectively coupled to the first and second input ports. The present invention also provides mounts for a shock absorbing device and a shock absorbing system employing the shock absorbing device of the present invention.