When we first saw these propagators – described as "budget" – we expected something flimsy and crackly, intended perhaps for a single use. However we were very gratified to find them well made and sturdy. The only thing about them that could be described as budget is the price.
They are a very useful size at approximately 35 x 21 x 12 cm as they will comfortably hold the 24 cube tray of Rockwool or Root Riot. They are of a quality that will allow them to be re-used many times.