Off the shelf aluminum and steel pulley stock. Great for making custom pulleys and quick machining of prototype pulleys. Pitches include: MXL (0.080"), XL (0.200"), L (0.375"), H (0.500"), 3MM HTD, 5MM HTD, 8MM HTD, 2MM PowerGrip GT2 (2MR), 3MM PowerGrip GT2 (3MR), 5MM Powergrip GT2 (5MR), T2.5, T5, T10, AT5, AT10. Stock lengths up to 18 inches. Inquire about custom longer lengths and special tooth counts.