Spring is an integral part of clip which prevents spring from popping out and maintains proper tension. Stainless steel axle that adds to the overall strength of the sensor. Vari-touque of strain relief reduces cable breakage. Beta was the first to use Kevlar® in it's cable design to create a stronger cable increasing life span. Shielded cable that provides a cleaner, truer signal. One year warranty to ensure customer confidence. Clearly labeled packaging for ease of identification in hospital environment. Compatible with most OEMs for wider applications. Our sensor are repairable that offers long term financial savings.