PETRAX premium aftermarket backhoe digging bucket. Part reference CAT-400. Width: 400 mm. Catalog application: CAT (Caterpillar) 400. 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.