https://phys.org/news/2018-06-image-sterilising-antenna-mars.html

The item seen here is the WISDOM (Water Ice Subsurface Deposit Observation on Mars) radar antenna flight model, designed to sound the subsurface of Mars for water ice.

"After pre-cleaning and then the taking of sample swabs, the antenna was placed into our dry heat steriliser, to target the required 99.9% bioburden reduction to meet ExoMars 2020's cleanliness requirements," explains technician Alan Dowson.