Johnyseeds has a good selection of these.
I have one that makes 3/4in cubes to start seeds. I have a 2 x 5 heat mat, with a plastic sheet and a drawn grid on top and can start somewhere around 1,000 seedlings at a time in that 2 x 5 space.
Time For The Pitchforks Yet?
There’s been class warfare for the last 20 years, and my class has won
End Corporate Rule, Legalize Democracy - www.MoveToAmend.org
Ask Lizzy to www.RunWarrenRun.org