The 2399.0 is an insulated ferrule designed for reliable electrical connections when terminating 14 AWG (250 mwz) stranded flexible wire in terminal blocks, circuit breakers, and control devices. It features a blue color-coded polypropylene sleeve with a tin-plated copper tube, providing conductor protection against breakage due to bending, wire stress, and vibration while facilitating smooth wire insertion into terminal clamps. The ferrule has a 12 mm ferrule length (C dimension), 18 mm stripping length (B dimension), 18 mm overall length (A dimension), and 2.5 mm outer diameter (D dimension). This product is ideal for industrial control applications requiring secure wire termination and is supplied in standard packs of 500 or 100 units for convenient ordering and inventory management.