This is an MPO fiber optic cassette for a 4-bay interchangeable patch panel with 1 MPO In and 4 LC Duplex Out single-mode duplex OS2. It is a highly flexible fiber management unit that can be used stand-alone or integrated into the MPO fiber optic patch panels. Additionally we supply a high-quality MPO cassette designed to reduce installation time and cost for optical network infrastructures in the premises environment. All of our products are 100% guaranteed to work providing you a cost effective solution for all of your network upgrade needs.