Sparex source: https://us.sparex.com/light-bulb-filament-hb4-12v-40w-p22d-snap-pack-1-pc-51134.html Product: Light Bulb (filament) hb4, 12v, 40w, p22d (snap Pack 1 Pc.) - Sparex S.51134 SKU: S.51134 Detail enrichment pending: OEM cross references, fitment, catalog pages, and full specifications.