Dynarex LabChoice Blood Collection Tube Holders are engineered to provide a secure connection to blood collection tubes, needles, and sets. Translucent plastic allows for easy viewing of blood collection for optimal efficiency. These Tube Holders feature an easy-to-handle design for improved control. The Blood Collection Tube Holders are available with luer-lock or luer-slip connections for optimal versatility. 250 PER BOX, 4 BOXES PER CASE