It is a highly versatile and durable solution for efficient tube storage and organization in laboratories. With interchangeable inserts accommodating tubes from 10 to 30 mm in diameter and volumes ranging from 5 to 50 mL, this rack allows for easy customization based on tube size. The inserts can be pivoted to upper or lower positions to fit various tube heights, and the angled design ensures comfortable pipetting. The open structure provides clear visibility of graduations and liquid levels, while the teardrop-shaped wells offer secure tube placement. Autoclavable and ergonomically designed with side handles, this rack is ideal for a wide range of clinical and research applications.