VWR Vwr Stand Dual Tube 15/50ml Unit PK. The color of the stand tube depends on the color of the urine and the color of the urine is pink to orange in color. The color of the stand tube is blue to green and the color of the urine is green to orange. To use the 50ml yellow urine collection cup simply remove the orange cap and place it in the stand. Specifications for VWR Vwr Stand Dual Tube 15/50ml 146-9004-VWR: Description VWR STAND DUAL TUBE 15/50ML Catalog Number 89199-176 Package Contents: VWR Vwr Stand Dual Tube 15/50ml 146-9004-VWR / 89199-176 The VWR Vwr Stand Dual Tube 15/50ml 146-9004-VWR is a quality addition to the Advantech Manufacturing lineup. For more great deals on Laboratory Glassware by Advantech Manufacturing please browse our Advantech Manufacturing Laboratory Glassware page. VWR Vwr Stand Dual Tube 15/50ml 146-9004-VWR Unit PK