Gomexus Titanium Reel Power Knob 38 41mm TA38Made of titanium with a 0. 6mm ultra thin hollow structure, it is light in weight and has the sensitivity to transmit slight impacts instantly. 38mm 41mm titanium round power knob is a great fitment for offshore saltwater fishing and jigging. Low thermal conductivity: warm in winter and cool in summer Anti corrosion: Titanium is called marine metal and is the most corrosion resistant metal material in the ocean Easy to remove stains, no fishy smell