The Ceramic Speed PW alloy Eagle 14 Teeth Gold Coated rear derailleur pulleys are designed for road bikes with 12-speed derailleurs. Made of lightweight ceramic material and featuring a gold coating, these pulleys are durable and stylish. The set includes 2 pulleys with a long cage derailleur cage length, perfect for smooth and efficient gear changes. Manufactured in Denmark by Ceramic Speed, these pulleys are a high-quality component for enhancing your cycling experience.