Oak Ridge Centrifuge Tubes, made of Polypropylene, have excellent contact clarity and can he used upto 50,000xG. The screw cap is fitted with silicon 0-Ring maldngit totally leak-proof. These tubes should not he used below 4UC.Material :- Polypropylene HSN CODE:- 39269099Item No.ParticularsPackingGSI/PL/6350116 ml Cent. Tube PP12 Pcs.GSI/PL/6350250 ml Cent. Tube PP12 Pcs.GSI/PL/6350316 ml Cent. Tube PC12 Pcs.