LP to Natural Gas BBQ – How do I know what size orifice?

I have a BBQ Grillware from Lowe’s. They do not know what size orifice I need for natural gas. Where do I find the information?

just drill out the orifice… www.joppaglass.com/burner/lowp_chrt.html
All Purpose Spatula Tongs From Charcoal Companion

Stainless Steel Straight Pipe [...]

We all love a BBQ, nothing beats it, nice weather (if you’re lucky!) and good food (hopefully). While we all love a good BBQ, many of us settle for a basic store bought BBQ, and neglect all the extra enjoyment and satisfaction that can be derived from building your own BBQ grill. If you only [...]