This cylinder is 45mm x 10 x 45mm Total (100mm in length) The Yale Security 6 pin Euro profile cylinder is a convenient everyday locking solution. Tested to the British Standard BS EN1303:2005 the cylinder is suitable as a replacement product on PVCu, wood and composite doors that require a standard level of security. If you moved into a new house, lost your keys or suspect someone else has access to a copy of your key, a replacement cylinder can be fitted in minutes without any specialist tools or equipment. 6 Pin cylinder: The Yale P-ED4545-PB 6 Pin Euro profile cylinder provides standard security and easy DIY installation Standard security: Durable, fire resistant cylinder lock approved by British standards; tested to ensure standard security against cylinder attacks Versatile: Suitable for use with a wide range of doors including wooden, composite and PVCu doors Dimensions and colour: This item's length is 45:10:45 (100 mm) and it comes in a Euro double version for key access on both sides in a brass finish Supplied with 3 keys How to measure your lock (Pleas see Images) Measurement A - Measure from one end of the cylinder to the beginning of the central turn mechanism. Measurement B - Measure from the other end to the beginning of the central turn mechanism. Now check your measurements: Measure the overall cylinder length from end to end. The length of the cylinder should equal the sum of measurements (A) and (B) plus the central turn mechanism (10mm) when added together. For example: If measurement (A) = 40mm and measurement (B) = 40mm plus the central turn mechanism (10mm) the size required would be 40/10/40 cylinder (90mm in length). This cylinder is 45mm x 10 x 45mm Total (100mm in length) Maintenance and care of your Yale cylinder - Yale recommend regular lubrication of your Yale cylinder locks to ensure continuous trouble free performance and operation. For this Yale recommend using a PTFE based lubricant. A small amount of lubri