The Shimano Aero Dynamics Spinning Reel Model 4000 features a unique combination of advanced technologies, including 5 shielded A-RB bearings and 1 roller bearing for smooth and durable operation. The Aerowrap II + 1-speed line lay system ensures consistent line retrieval and reduces tangles, while the cold forged aluminum extra spool and single machined aluminum handle provide added strength and style. With a maintenance port in the CI4+ body material, this reel is designed for easy maintenance, although it does not feature waterproof drag.