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.
Beko BL20, BL21 Fridge Freezer Door Hinge Pair for C00144878 Replacement Kit
Fridge Freezer Integrated Door Hinge Set for BEKO BL20 BL21 BL21BI BR11 BZ30 x 2
BEKO BK8192 BK8195A+ BL20 BL21 INTEGRATED FRIDGE FREEZER DOOR HINGE KIT 81319
Beko Fridge Glass Shelf Bottom Lower BL20 BL21
UPPER R/HAND / LOWER L/HAND Door Hinge For Beko BL20, BZ30, BZ31, BL21, BR11
BEKO BK8192 BK8195A BL20 BL21 Integrated FRIDGE FREEZER DOOR HINGE KIT 81319