LC duplex plastic adapter, SC simplex design with metal clip , slotted ceramic guide sleeves for single mode and multimode applications, with transparent dust protection caps for a better visibility during red light test , high material stability, surface quality and durability , durability min. 1000 mating cycles with a ceramic guide sleeve , screws and nuts included, variants: blue (OS2), green (OS2 APC), lime green (OM5), violet (OM4), aqua (OM3), each variant available in packing units of 1 piece or 50 pieces