Features: 

* Inside is made of smooth stainless steel, while outside of quality steel treated with electrostatic spray coating. 

* Mechanical or electronic interlock ensures two doors can't open at the same time. 

* Indicator light turns on when another door on the back side is opened. 

* Sealing strips are used to ensure air tightness. 

Optional accessories: 

* Inside light or ultraviolet light for sterilization 

* Audible and visual alarm system 

* Full stainless steel pass box