These are the "standard" 1020 trays, about 10 inches wide and 20 inches across. I wouldn't guarantee that their domes will exactly match up with another brand of tray. It's likely, but if you want to be sure of a match, order both tray and dome. And let me know what height dome you are interested in! They come in a 2" unvented clear dome and a 7" vented clear dome.
Please look at the greenhouse megastore site for particulars. We are looking at the following:
Black mega heavy duty 1020 trays. These are about $3.60 per tray (with tax), and must be purchased in sets of 10. In a carton of 50, the price drops to $3 per tray.
https://www.greenhousemegastor...
2" clear plastic humidity domes. The 2" clear (not vented) humidity domes are $3.50 each with tax and must be purchased in packs of 10.
https://www.greenhousemegastor...
(maybe) 7" vented clear humidity domes. The 7" clear vented humidity domes are $6.70 each with tax and must be purchased in packs of 5.
https://www.greenhousemegastor...