Ground joint couplings with interlock Available Size:1/4", 1/2", 1", ... /4", 1-1/2", 2". Pipe fittings Hose couplings Ground joint coupling / Steam hose coupling Sizes:From 1/4" to 2 ... Body material: Zinc plated ductile iron, zinc plated carton steel Sealing:Viton, NBR Thread type:BSP, NPT, NPSM Ground ...