Where do you all buy your external columns heaters?
I have a GPC method that requires 5 7.8x300mm columns along with a guard column. These are all going to be assembled with a column selector valve that will be working in cohorts with another set of columns. I'm trying to find an external column heater that can contain all of these columns and transition between column sets with ease. My company is based in America. Where would I be able to find a column heater to accommodate all of these details?