A 12 hole black plastic carry tray for 100mm pot. The tray has a star base on each of the compartments. Length 435mm; width 328mm; height 70mm. The hole diameter at the top is 93mm and at the bottom 72mm.
From Thailand, the following pots are able to be used in this tray.
Port Pot PP100D, sits down onto the base of the pot holder and is somewhat wobbly in the holder - but acceptable
Port Basket Pot PB080, sits down onto the base of the pot holder - is a bit wobbly in the holder - but acceptable
Basket Pot B-010 - fits well into the pot holder
Slatted Pot 3.5RB - fits well into the pot holder
Pot HP-040 - fits loosely into the pot holder but due to large taper and wide rim at the top, adjacent pots would foul on one another.
There may be other pots that are able to be used in this tray.