Small Dewars These smaller volume dewars are mainly for IVF and Veterinary use. SC (Standard Capacity) For Straw and Vial storage XC (Extra Capactiy) For Straw and Vial Storage Doble Series for Vial storage in 10x10 and 5x5 CryoBoxes CryoSystem Series, low LN2 usage storage in 10x10 and 5x5 CryoBoxes