Description: Aluminum and carbon fiber knob for spinning or bait casting reel. Incorporates 2 stainless steel ball bearings. With supplied screw nut, easy to install. An essential part of fishing reel, easy to install and use. Great to replace the old or broken one. Suit for saltwater/freshwater use, corrosion resistance. Specification: Material: aluminum, carbon fiber Length: Approx. 42mm/1.7inch Top Diameter: 2.1mm/0.09inch Principal Axis Color Random, but no difference after installing. Package Includes: 1 Piece Fishing Reel Handle Knob 1 Set of Mounting Kits