THE MOST IMPORTANT STOPCOCK DEVELOPMENT SINCE TEFLON*
NEW, REVERSE-TAPER Teflon plug stopcock turns at a touch The REVERSE-TAPER design of these new PYREX brand Teflon plug stopcocks gives you all the good features of Teflon plugs and eliminates the headaches of conventional types. Constant spring tension holds the Teflon plug against the mirror-smooth glass shell for a leakproof seal. There are no locknuts or other mechanical devices to adjust . . . no threads to strip. The REVERSE-TAPER plug turns at a touch. Turn, it's open. Turn, it's closed. You always have fine control, instantly. You cannot accidentally dislodge the plug. However, you can "take it down" in seconds by simply pressing the handle
sideways through the spring housing. Reassembly is equally fast and sure. No contamination—only Teflon and PYREX brand glass touch the product. No grease is needed. Completely corrosion resistant—all components are selected for maximum service . . . Teflon plug, PYREX shell, nylon handle and spring housing, stainless steel spring. No freezing—no breakaway even after long exposure to alkaline solutions. Inert to virtually all chemicals.
P Y R E X ® l a b o r a t o r y w a r e . . . the tested tool of modern research 38 A
·
ANALYTICAL CHEMISTRY
