Our Fiber Optic LC Mating Sleeves have a polymer body and a zirconia or phos. bronze sleeve, depending on the particular mating sleeve chosen. Styles available are multimode, singlemode, APC, duplex, simplex and quad. In addition to this particular style mating sleeve, we offer other fiber optic mating sleeves, adapters, adapter panels and connectors for every conceivable need and application. Hybrid mating sleeves are also available. If you don?t happen to see the item you need on our website, just ask our sales associate. It is likely that we have the item our large, in stock inventory, or we can get it for you.