This ODD No. 02 is really beautiful model. A solid, durable unit made of steel 304 with fine ventilation holes on top. It measures 7 cm high and 5 cm wide.  

Using an ODD offers major advantages in detection training: it keeps odors contained, prevents contamination, ensures consistent vapor release, and allows you to present targets in a clean, standardized, and repeatable way. This gives your dog a clearer learning experience and makes your training more reliable and professional.