Lid with air-venting system for controlled gas exchange with low evaporation, Vented base for air flow between stacked dishes to prevent condensation, Sloped edge allows placement of the lid in one position only, Yellow inscription field: yellow on yellow – match!, Surface activated growth area on spherical zone of well only.

Lid with air-venting system for controlled gas exchange with low evaporation, Vented base for air flow between stacked dishes to prevent condensation, Sloped edge allows placement of the lid in one position only, Yellow inscription field: yellow on yellow – match!, Surface activated growth area on spherical zone of well only.