EURO KEYED ALIKE THUMBTURN CYLINDER 30/45TMM (75mm) BRITISH STANDARD YALE NICKEL
Overall size of cylinder is 75mm : 30/45T - T signifies THUMBTURN, which should be the internal side. Yale factory code: B-ET4025KA-SNP-B. - Keyed alike cylinder, one key fits all cylinders. 25-10-40T (75MM).