Steel single-groove V-belt crankshaft pulley for Chevrolet small block engines using a long water pump. Measures 6.875 inches in diameter with a three-bolt mounting pattern and is available in chrome or black finish. Designed for standard accessory drive ratios and must be paired with a matching Summit or Trans-Dapt steel water pump pulley for proper belt alignment. Provides a durable, clean upgrade that helps reduce accessory drag while maintaining reliable belt operation. Sold individually.