The blenders are compatible with any Chef or Major which was manufactured from around 1976, although they will not fit the A701 or A707 models. The A901/ A907 models are compatible. Your model number can be found on the underside of your Chef or Major. Kenwood spares offer an excellent choice of liquidisers for your Chef or Major, which are as follows: AT358 – ThermoResistTM Glass (Heatproof) KAH358GL ThermoResist Glass Blender with Stir Stick - supplied with the new Chef Sense and Sense XL AT338 – Glass (Not heatproof) AT337 – Acrylic (Not heatproof, but lightweight) All five blenders have a 1.5 litre working capacity for cold ingredients. The AT358 and KAH358 have a 1.2 litre capacity for hot ingredients. All of the above can be purchased from our spares supplier via www.4kenwood.co.uk or by calling 0844 557 3653.