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 Fridge & Freezer Chest Freezer Basket Handle Genuine
Chest Freezer Basket Expandable PP Heavy Load Organizer for Kitchen
Fridgemaster Chest Freezer Basket 49.5cm Long x 22.cm Wide GENUINE
Genuine Zanussi Chest Freezer Basket Handle 2913400046
BOSCH Chest Freezer Basket 49.5cm Long x 22.cm Wide GENUINE
Beko Chest Freezer Basket GENUINE For CF47591W