Cheap And Discounts 100 Holes Laboratory Plastic Tube Box Rack Use for 2ml 1.5ml 1.8ml Cryopreservation Tube With Connection Cover , 1piece Wholesale. Buy Directly From Merchant China School & Lab Supplies Store. Enjoy ✓Free Shipping Worldwide! ✓90 Days Buyer Protection. ✓Easy Return. ✓Money Back Guarantee.