This is a 69m 24xST (male) to 24xST (male) OFNP (Plenum-Rated) fiber trunk cable. It is most commonly used for 100 Megabit Ethernet applications. This optical fiber, nonconductive, plenum (OFNP) cable is best suited for use in interior fiber-optic applications. A duplex cable is a two-strand fiber optic patch cable that works best with transceivers that both transmit and receive. Our patch cables are 100% compliant for all of your networking needs. Our products are guaranteed by federal law to not affect or void OEM warranties.