Directional Couplers 4XX-555-2700 4XX-700-2700 PART #: 4XX-555-2700 Low-PIM Directional Couplers555MHz – 2700MHz PART #: 4XX-600-2700 Low-PIM Directional Couplers600MHz – 2700MHz PART #: 4XX-600-3800 Wideband Directional Couplers600MHz – 3800MHz PART #: 4XX-600-6000 Ultra Wideband Directional Couplers600MHz – 6000MHz PART #: 4XX-700-2700 Low-PIM Directional Couplers698MHz – 2700MHz