B&B Manufacturing provides fast and economical production of timing pulleys for custom and prototype applications. That means whether you have a unique need that can't be met with standard pulleys or require a quickly machined pulley for a low-risk, high reward prototype, we're here to help. We stock lengths up to 12 in, but can accommodate longer lengths and custom tooth counts. B&B Manufacturing Powerhouse™ XL Timing Pulley Bar Stock, 4.564 in Outside Dia, 4.584 in, 72 Grooves, 0.2 in Pitch, 1 in Hub Dia, 9 in Overall Length, Aluminum