RFS/Celwave 633-6A-1N, 406-450 Mhz, Compact Internal Duplexer, 50 Watt Quantity in Basket: None Code: 6336A1N Price: $300.30 Shipping Weight: 9.00 pounds Quantity: Radio Frequency Systems/Celwave 633-6A-1N, Compact Duplexer 406-450 MHz, Frequency Separation 5 MHz, Power Rating to 50 Watts, 6 Cavities, N Female Connectors, 1-1/4" x 6-3/16" x 9-1/2", 5 Pounds. List Price $390.00.