The Small Sized Storage Series (Square Racks) is designed for laboratories that need compact, organized cryogenic storage with low liquid nitrogen consumption. The official page states that the line is widely used in laboratories and combines ultra-low evaporation loss with storage compatibility for square racks and cryo boxes.

The series uses durable, strong, lightweight aluminum and includes lockable accessories for added security. It also features dual handles for easier handling and offers optional temperature data-logging monitoring.

Public technical material indicates five models with capacities ranging from 600, 600, 750, 900, and 1,100 standard 2 ml cryovials. Publicly listed examples include the YDS-35-125 at 35.5 L, YDS-47-127 at 47 L, and YDS-50B-125 at 50 L, all with wide-mouth openings suited to square rack storage.