Single use, made of crystal polystyrene. Accuracy > 98 %.rSterilised by radiation. Non pyrogenic (ISO 10993-11), non cytotoxic (ISO 10993-5) and non haemolytic (ISO 10993-4). Peel-pack packaging. DNase and RNase free.rGuaranteed features for 5 years. Each pack is delivered with sterility and conformity certificate.