Made from polycarbonate Transparent lid for easy viewing of contents Frosted writing area for smear-resistant marking Printed numerical grid for easy sample identification Each box features two angled corners to guarantee proper alignment of the grid Vent holes for drainage and rapid freezing Fits in stainless steel freezer racks Plastic vial picker (#30078) is supplied with each BioBox Available in 25-place, 81-place and 100-place sizes and in assorted colors