This is an optional Pro Boat 1.34" x 2.06" Stainless Steel Propeller. Pro Boat stainless steel propellers offer increased durability and improved performance over plastic or composite propellers. Upgrading to stainless steel propellers is easy and affordable, providing improved acceleration and top end speed at a nominal cost. In addition, you can easily balance any Pro Boat stainless steel propeller for even faster acceleration and higher top end speeds. This prop is a direct replacement for the 1.34" x 2.06" Composite Propeller (PRB0150), and is designed to fit the ProBoat Blackjack 26 nitro, 1/12 hydros (Nitro only), Apache, ShockWave 26 RS, ShockWave 26 Brushless, WidowMaker and Classic Runabout boats.