SPL® Snap Tube Rack for 15ml snap tubes with 25 holes 冷凍小管架([TDS] SPL Snap Tube Rack.pdf) SPL Snap Tube Racks have identical design to the SPL Conical Tube Racks, but has significant differences in inner dimensions and enhanced structural integrity. Racks are uniquely designed for handling and storage of 25 Snap Tubes. ( 5ml/15ml or 50ml respectively)