Socorex® Bottle-Top Adapters
By DWK - Wheaton Science Products
Both the Calibrex® 520 and 521 Bottle Top Dispensers come standard with a 32mm screw thread, and included with each dispenser are three polypropylene bottle neck adapters (28, 40, and 45mm for the 520 model; and 38, 40, 45mm for the 521 model). These adapters are available separately.