David Clark C4221, Radio Interface Cable Quantity in Basket: None Code: C4221 Price: $122.85 Shipping Weight: 3.00 pounds Quantity: C4221 Radio Interface Cord Provides connection between master station and mobile radio system. Weather tight, twist lock connection to master station. Radio end has stripped and tinned leads. Twenty-one foot, 8 conductor shielded cable, 24 gauge.