1. Adapters are plugged in with 30 angle with the box, which is not only to guarantee the curvature radius of the patch cord but also to make operator’s eyes free from radiation of laser. 2. 19″standard mounting design with static electric plastic sprayed, nice appearance; 3. Can be used for ribbon & bunch fiber cables; 4. FC & SC types of adapters could be plugged in; 5. Clear fiber route, pigtails could be coiled and stored on the tray; 6. Flexible installation, convenient for operation and maintenance.