GU Old Style ricambio uPVC scatola ingranaggi serratura porta cassa centrale 30 mm / 28 mm backset
Backset: 30mm. The follower is 8mm with the surround being thicker on the 30mm and thinner on the 35/45mm. Case Width: Backset + 19mm. Main Gearbox: Latch & deadbolt. GU gearboxes are fixed to their faceplates with 3 screws.