Fiber is a passive devices, used to connect optical fiber cable to form a continuous optical patch. It has been widely used in fiber optic transmission, fiber patch panel, and optical fiber test instruments. Features -Color: Blue. -Material: Plastic. -Size: About 5.50X1.00X1.00cm/2.16X0.39X0.39in. -Insertion Loss: <=0.3dB. -Return Loss: &gt;50dB. -Length: 50mm. - Easily installed. Quick assembly connector can provide quick and easy termination of fibers in the field. - It allows the installer to terminate and make connection in minutes at equipment and fiber patch panels. - With features of installation quality, high success rate and high reliability. - Its advantages are precise alignment, elastic mount, reliable fastening, etc, can make the signal low loss. - Mainly made of durable and safe plastic materials, it can serve you well. Package list: 10 x Fiber Optic Connectors