100 pair 110 punch down block, rack-mount (block only) for telephone & data connections; Height is 1U. Fits in a standard 19" rack.Uses 110 connector blocks ("C" Clips) which require a standard punch down tool and 110 punch down blade.
200 pair 110 punch down block (Block Only) for telephone & data connections; 2U rack-mount Uses 110 type Connector Blocks "C-Clips which require a standard punch down tool and 110 punch down blade.