The holder itself is made of metal netting, so it can be placed directly into the incubator.
One included tray can hold five φ90 x 20 mm petri dishes.
Can store up to 5 trays. Material: Steel, chrome plated
Comes with 3 trays
Size (mm): 250 x 240 x 190
Aperture: 22.5 x 22.5 mm (with a tolerance of about ±0.5 mm)
RoHS2 (EU)2015/863 compliant [About RoHS]
