Overview Product Description Cryo Sleeves 100 per box Cardboard Vial Protectors These cardboard sleeves fit over the aluminum cases, which in turn protect the vials from other canes, and make it easier to remove vials from the tank. Custom Field Product Reviews Write a Review Write a Review × Cryo Sleeves Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Review Subject * Comments *