TEST TUBE CAP (LSE) This transparent polypropylene cap for Test Tubes proves to be an excellent protection to the contents to the tubes. The grooves inside the cap tighten the fitting on the tube while the outer grooves would hold identification labels. The built in seal ring would set in the tube making the combination a leakproof one. Material: Polypropylene Cat. No. Particulars 5014150 Cap for Test Tube ø 25 mm Qty :