This cylinder can be custom made by Kaba ilco, takes about 8 weeks and is expensive.

May be replaced with one of the following:

413555010 - 35/55
413160010 - 31/60

Euro Profile Cylinder Thumbturn - 3 keys - Yale 6 pin Y2 keyway
Available in brass or Satin Chrome and in a choice of sizes - Please choose the colour and size from the drop down boxes above.
information on how to measure your cylinder.

Measurements:
a = 2-3/8 inch (60mm) Key Side
b = 1-11/16 (40mm )Thumb Turn Side
c = 3-15/16 (100mm) Overall Cylinder Length
Color / Finish: Satin Chrome or Brass
Keyway: Yale 6-pin, Y2

NOTE:
Cylinders come in many different sizes and it is important to get the correct size.

This locking euro cylinder is engineered for long term trouble free performance and offers excellent resistance to forced entry. It is designed with anti pick security and can be fitted to front, rear or patio doors

A Thumbturn cylinder is ideal for locations that require controlled access from one direction and easy access from another.
Having a thumbturn on the inside of your door can help save lives in the event of a fire as there are no keys to find, helping you exit your home as quickly as possible.

TO DETERMINE WHICH SIZE YOU REQUIRE:
Put your key in the lock and open the door.
Remove the screw which is below the latch.
Turn the key until you can feel the lock moving.
As you turn the key the central section will line up with the rest of the lock and you can then slide the lock out.
Each cylinder has two halves, measure from the edge of the cylinder to the CENTER of the Screw Hole on both halves to determine which size you require