# Fixture block pins **URL:** \ **Category:** General\ **Created:** [July 19, 2025, 10:20am UTC](https://fireball.discourse.group/t/fixture-block-pins/3783 "2025-07-19T10:20:53Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![Marcjwebb](https://yyz2.discourse-cdn.com/flex036/user_avatar/fireball.discourse.group/marcjwebb/32/4071_2.png) [@Marcjwebb](https://fireball.discourse.group/u/Marcjwebb)\ **Post date:** [July 19, 2025, 10:20am UTC](https://fireball.discourse.group/t/fixture-block-pins/3783/1 "2025-07-19T10:20:53Z")
Hi all. I wanted to know if the pins are interchangeable between the 16mm and 19mm systems. For example, I want to start with 16mm but when I upgrade the table can I swap out the pins for the 19mm but use the original blocks and fixtures and swap the pin sizes. It would be great to have the option to stay within the ecosystem without having to purchase an entire new set of fixtures If this isn’t currently an option, why not? And can it be done ? Surely having someone able to keep buying and adapting is better. ---
**Author:** ![Fireball\_Jason](https://yyz2.discourse-cdn.com/flex036/user_avatar/fireball.discourse.group/fireball_jason/32/52_2.png) [@Fireball\_Jason](https://fireball.discourse.group/u/Fireball_Jason)\ **Post date:** [July 19, 2025, 3:05pm UTC](https://fireball.discourse.group/t/fixture-block-pins/3783/2 "2025-07-19T15:05:14Z")
Some fireball blocks can be converted from 16 to 3/4. This only works if the table you have is on 2”centers. ---
**Author:** ![Marcjwebb](https://yyz2.discourse-cdn.com/flex036/user_avatar/fireball.discourse.group/marcjwebb/32/4071_2.png) [@Marcjwebb](https://fireball.discourse.group/u/Marcjwebb)\ **Post date:** [July 19, 2025, 4:52pm UTC](https://fireball.discourse.group/t/fixture-block-pins/3783/3 "2025-07-19T16:52:24Z")
Ok cool Aren’t all the holes on the FB tables 50mm on centres ?