MettlerToledo Stopcock + Ceramic Valve Disc 51107525. Made of highly durable ...Mettler Toledo Stopcock + Ceramic Valve Disc 51107525. Made of highly durable and reliable materials the Mettler Toledo Stopcock and Ceramic Valve Disc 51107525 is a sure fire way to get your work done. This Stopcock and Valve Disc from the experts at...more