Tripp Lite N844-LOOP-12F MTP / MPO OM3 Fiber Optic Loopback Tester is typically used for test and measurement procedures in networking environments. The device is ideal for a multitude of applications that require signal looping in a MTP / MPO form factor. Features push-pull tab for easy disconnect. A dust cap is included for protection during storage. - MTP / MPO Loopback for 40GbE QSFP+ Optical Testing - 50/125 OM3 6-Fiber - MTP / MPO OM3 Loopback Tester - Push-pull tab for quick disconnect - Protective dust cover included for protection during storage - 4-inch overall length - Pin config: 1 -12, 2-11, 3-10, 4-9, 5-8, 6-7