The STS Parts Two Groove Alternator Pulley (Part #24-1101) is a precision-machined component built from cold rolled steel for maximum strength and reliability. Designed to accommodate two 3/8" (10mm) belts, this pulley is ideal for alternator setups requiring dual belt routing. Compatible with a wide range of Delco and Ford alternator models, including Delco 10SI, 12SI, 15SI, 27SI and Ford 1G, 2G types, this pulley supports many applications across automotive, industrial, and agricultural equipment lines. Whether you're restoring a classic car, upgrading a hot rod, or replacing worn components on farm equipment, this steel double groove pulley delivers consistent belt alignment and long-lasting performance. Package Includes: (1) Two-Groove Steel Alternator Pulley Pre-machined with 17mm bore for installation Ready for 10mm (3/8") dual belts Specifications: Pulley Type: Double Groove Belt Width: 10mm (3/8") Outer Diameter: 67mm Bore Diameter: 17mm Material: Cold Rolled Steel Condition: 100% New Replaces OEM Part Numbers: Delco 1846787, 1964758, 1968354, 1970830; Ford C5AZ-10344-L, C5TF-10A352-K2, E4TZ-10344-B; WAI 24-1101 Fits Alternator Models: Delco 10DN, 10SI, 12SI, 15SI, 27SI; Ford 1G & 2G Used On: Various vehicles and machinery from 1960s–1990s, including models by Chevrolet, Ford, GMC, Jeep, Case, Massey Ferguson, Hyster, International, and others.