This is a 2 Groove small sheave for the hydraulic hoses on the outer stinger weldment for a Vulcan 807/810, Century 300 Series, and Holmes 440SL by Miller Industries. See brochures for reference chart and see Features for related parts.
Related Parts:
Outer Stinger Weldment (810300000)
Related Hardware:5/8" Washer (12-0400505)5/8" Retaining Ring (9055062)