Thermal characteristics of cap inserts are identical to Cryovial . Low temperatures to -190 C Listed colours are stocked, others available on order. A transparent cover allows the user to see the contents of the box and is keyed to the base to prevent misalignment. Manufactured from a non-toxic polyallomer, vials are strong and clear. External threads result in a smooth inner surface which avoids airborne contamination and sample loss.
Screw cap has a moulded sealing ring which givess a leakproof seal without a washer.
Caps are blue in colour. CRYO-LOK vials have conical bottoms for maximum sample retrieval and allow centrifugation. A moulded skirt enables vials to stand on a bench. Knurled sides give a better grip for tightening or removing the cap. A frosted area for labelling is provided.