PVC Pump Tube 3tag, 72mm spacing, 1.42mm ID Yellow/Yellow (PKT 12).Tag Colors: Yellow/YellowID mm: 1.42Wall Thickness mm: 0.86OD mm: 3.14Overall Length: 455mm (72mm spacing between tags)Number of Tubes Per Pack: 12Physical Properties: Thermoplastic, PVC based material with plasticizerMaterial: Made from Tygon R3603/R3607 or equivalent.Special Properties: Inexpensive all-around tubing for general laboratory applicationsChemical Compatibility: Excellent for aqueous solutions of the following acids and concentrations, up to 35% Nitric Acid, up to 37% Hydrochloric Acid, up to 25% Hydrofluoric Acid, up to 30% Hydrogen Peroxide.