Labconco BTLSERUM20MMCORK PK-100 10ML. The specially designed top prevents breakage of the clear wells and allows visual inspection of the serum or urine. The syringe connector a calibrated calibration standard connects the funnel or syringe to the manifold and the standard graduations on the top and bottom of the wells provide a standard operating procedure for the aseptic transfer of the sample into the collection container. The stopcock forms part of the luer slip connection on the threaded cap. The cannula is not affected by the protein solubility and solubility of the protein in urine. The protein is a natural occurring constituent of urine. Like all urine specimens a color change from pink to white occurs when the color change occurs. The color of the urine will change from light yellow to deep purple when the protein concentration is high. The white color change with the assay determines the color change. The color change does not affect the protein content. The protein content is measured by the density of the protein in the urine. The protein content will not change. The color change does not occur with the standard color change of 100 percent. The protein content will not change. Specifications for Labconco BTLSERUM20MMCORK PK-100 10ML 7573210 : Description: BTLSERUM20MMCORK PK-100 10ML (Please note that the description and stock photo may not correspond to the specific model listed above) We offer only genuine Labconco products authorized for sale in the U.S. and other markets so you can be sure that you are buying authentic Beakers Test Tubes Flasks & Accessories with a full manufacturer's warranty in addition to our own 100percent Satisfaction Guarantee. We are your premier online distributor for Labconco Beakers Test Tubes Flasks & Accessories. We are an authorized supplier to all federal and state government agencies as well as to research and educational institutions and can facilitate volume orders on many types of laboratory equipment lab consumables and other products to help fulfill your specific needs. We offer Free Shipping and FREE USPS shipping to APO and FPO addresses on all orders in our store over 49. Please refer to our APO/FPO Shipping and Export Restrictions for more information on export to APO/FPO addresses. In addition to the Labconco BTLSERUM20MMCORK PK-100 10ML 7573210/ 26675-687 we carry a full complement of Beakers Test Tubes Flasks & Accessories as well as other product offerings from Labconco. We also carry a full line of Labconco accessories to help meet your laboratory and scientific needs. For a complete selection of Labconco Beakers Test Tubes Flasks & Accessories please visit our Labconco page. For more brand name Beakers Test Tubes Flasks & Accessories please visit our Beakers Test Tubes Flasks & Accessories store section. To see our complete line of lab medical industrial and scientific products please see our science and lab equipment online catalog. Labconco BTLSERUM20MMCORK PK-100 10ML 7573210