# What is the difference between window lens thickness T2 and T3

**URL:** <https://forum.cloudray.com/t/what-is-the-difference-between-window-lens-thickness-t2-and-t3/304>\
**Category:** CO2 Lens\
**Created:** [April 21, 2021, 1:20am UTC](https://forum.cloudray.com/t/what-is-the-difference-between-window-lens-thickness-t2-and-t3/304 "2021-04-21T01:20:30Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![Technician](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.cloudray.com/technician/32/15_2.png) [@Technician](https://forum.cloudray.com/u/Technician)\
**Post date:** [April 21, 2021, 1:20am UTC](https://forum.cloudray.com/t/what-is-the-difference-between-window-lens-thickness-t2-and-t3/304/1 "2021-04-21T01:20:30Z")

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The thickness of the lens is different, there is no difference in use, and there is a difference in installation. Generally, there is a slot or clamp at the position where the lens is installed. The thickness of the lens is selected according to that depth.