The model number is normally found inside the fridge or freezer. You will likely need to remove the salad drawer or freezer drawer to find the model number plate. Otherwise the model number is likely to be on the side or rear of the appliance.
Bosch KUR15A50GB Fridge Door Bottle Shelf Rack Tray Bottom GENUINE 704904
Bosch KUR15A50GB Fridge Door Bottle Shelf Rack Tray Bottom Lower GENUINE 704904
Bosch KUR15A50GB Fridge Door Shelf Rack Tray Top & Middle GENUINE 00702549
Bosch KUR15A50GB Fridge Door Shelf Rack Tray GENUINE
BOSCH Integrated Fridge Door Slider Kit For Decor Cupboard Door GENUINE 491367
Bottle Holder Shelf for Bosch KGV33VLEAG Fridge Door Bottom Tray Lower Rack