... pair distribution box (snap locking type)b) WT-1062: 20 pair distribution box (screw locking type) ... c) WT-1063: 30 pair distribution box (snap locking type) ... 3) Specially for WT-1063, there are 10 pairs, 20 pairs, 30 pairs all available4) The same box ... Units Produced(Previous Year) Distribution box, Fiber cabinet, Module, Optical distribution ...