5 x standard size seed trays with drainage holes, made from 54mm thick recycled plastic.
5 x standard size insert , depth 52mm, 40 compartment, uncut / unperforated.

5 x propagator lids, slightly domed, 50mm clear plastic. 

With a little careful handling, the lids and trays can be used over and over again - wash them after use & keep out of direct sunlight when storing them.

All in all an excellent economy buy.