PETRAX premium aftermarket excavator bucket. Part reference CAT37455HD. HD configuration. Rated capacity stated in catalog: 5.5 m³. Catalog application: CAT (Caterpillar) 374. Other-brand applications are possible only after dimensional verification; this listing does not confirm interchangeability. Fit is conditional on matching pin diameters, pin-centre spacing, mounting width or quick-coupler interface, and the machine’s permitted bucket weight and capacity. Machine tonnage alone does not guarantee fit.