Provide LC adapters to ensure the connection between fiber patch cable. Accessoire Réseau Fibre Optique 10Gtek LC/UPC Singlemode Fiber Optic Attenuator 7dB, 2 Pack Atténuateur Fibre Optique LC/UPC 3dB About this item Connector/Connection Polish: LC/UPC Male to LC/UPC Female. Attenuator db: 7dB. Low Insert-loss & High Return-loss: Optical fibers are connected by adapters through internal open sleeves. Provide LC adapters to ensure the connection between fiber patch cable LC UPC Atenuador de fibra óptica 1dB 30dB Atenuador fijo variable Low Insert-loss & High Return-loss: Optical fibers are connected by adapters through internal open sleeves. Connector/Connection Polish: LC/UPC Male to LC/UPC Female., Attenuator db: 3dB.