Billet Aluminum Smooth Idler Pulley with Side Lip Product Details: 6 rib width Flanged sides keep belt aligned with the pulley Made in the USA from billet aluminum 2.95" Outer Diameter Features Timken 6203-2RS ball bearing for the longest lasting performance Black anodized Replaces 6-rib smooth pulleys on ICT Billet brackets *NOT compatible with automatic belt tensioners