Mercury Black Diamond 10 3/8 x 13 RH Aluminum Propeller - TA2106T. The Mercury Black Diamond 10 3/8 x 13 RH Aluminum Propeller (TA2106T) is engineered to deliver reliable performance and durability for small to mid-sized outboard engines. Its three-blade design and right-hand rotation provide smooth acceleration and consistent handling, making it a dependable choice for various boating activities.. go2marine.com. Key Features. Three-Blade Aluminum Design: Offers a balance between performance and