... , soft, smooth, non-toxic PVC, X-rayopaque line throughout the tube, soft rounded, bevelled tip. non return valve is made ofimported ... choices for the convenience of operator.SpecificationsBallonet style Tube top specification (cuffed/uncuffed)Cylinder balloon Beveled tip/Rounded 2.5,3,3 ... .5,5.0,5.5,6.0,6.5,Olive balloon tip 7.0,7.5,8.0,8.5,9 ...