PVC Pump Tube 3tag (95mm spacing) 1.85mm ID Green/Green (PKT 12). All tubes made from Tygon R3603/R3607 or equivalent.Tag Colors: Green/GreenID mm: 1.85Wall Thickness mm: 0.86OD mm 3.57Overall Length: 455mm (95mm spacing between tags)Number of Tubes Per Pack: 12Physical Properties: Thermoplastic, PVC based material with plasticizerSpecial 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.Limitations: Potential leaching of plasticizersGlass Expansion is ISO 9001:2015 certified by AB Certification, No. AU4501-9001