Buy 300 x 600 K-Rad Radiator and a wide variety of other Kartell Radiators at the cheapest prices online for the same radiator. Fast delivery around the UK. We stock Type 11 Radiators, Type 21 Radiators and Type 22 Radiators in various sizes. All our K-Rad Kompact Radiators have 5 years manufacturers guarantee against defects for added peace of mind. These white radiators will efficiently heat any room and will also be sure to look stunning in whatever room you put them in.