This Viper offset espagnolette gearbox is suitable for aluminium windows and in 21mm, 18mm and 16mm fork heights. Please note that gearboxes are designed as handed, variations listed in the table belo...
This Saracen gearbox with a black cover plate connects to the rods by pushing them in and twisting them to lock in place.
These gearboxes have a 22mm backset and come handed.