Description Ferrule for stainless steel tubing that allows connection to glass tubing. Roll On Ferrule Dimension drawing and rear view in detail images at left. B = 1.5 in. A = .812 GEA 4999-1000-651 Old Hamby number 1000-651 Ezee 54396 Order gasket and coupling by part numbers shown below Related Items; 1000-251 1.5 Glass Coupling Kit 1000-074 1.5 Glass Gasket 54398 1.5 Weld on Ferrule 54396 1.5 Roll on Ferrule 04/2024