Fiber Optic Adapter or coupler is used to mate two connectors together. It is usually mounted in a distribution panel or wall box. ANC fiber optic adapters are precision made to ensure perfect alignment of connectors, reducing insertion loss. In most cases, it is a critical part of the system aligning. Ceramic sleeves are for general use, bronze sleeves are also available upon request. In the case of MTRJ or MTP/MPO adapter, the alignment is carried out with two small pins being fitted to one of the connectors. The adaptor is purely to support and lock the connectors together in the distribution panel or wall box. Fiber optic adapter can be female-female type, female-male type, hybrid female-female type, and hybrid female-male type. Most fiber optic adapters have simplex and duplex version, some adapter like LC fiber optic adapter has Quad type. ANC can provide whole range of fiber adapters, like SC, FC, ST, LC, MTRJ, MPO, E2000, etc. such standard mating sleeves and female-female or female-male hybrid adapters, like FC-LC, FC-ST, SC-LC, SC-ST, SC-FC etc.