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Changing Conservatory Door Handles The replacement of your conservatory door handles is a simple job that most people will be capable of doing themselves. It is important to first find out if your current handles have springs or not. We stock a variety of replacement handles to suit all the major uPVC double glazing manufacturers including Hoppe, Mila, Avocet and Fab 'n' Fix. To choose the best handle for your door, take two measurements that are crucial that are