Penny Head Stopper, Amber, Made With Borosil Borosil® Amber Solid Penny Head Glass Stopper, Interchangeable Ground Joint 34/35 CS/20 Specifications Material: 3.3 Borosilicate Color: Amber Class/Quality Grade: Class A/Type I Dimensions: 500mm(19.69") X 254mm(10.00") X 254mm(10.00") Joint size: 34/35 Documentation Datasheets Coming Soon! Videos Videos Coming Soon! Check out all of our videos on our