... ,Steel , Plated:Zinc,Nickel, Size:alll sizes N601 M6 Stainless Brass Alemite Grease nipples Feature Standard:BSP,SAE,Metric,SAE,DIN ... ,13*1,13*1.5,14*1,etc,Metrial:Steel,Brass or Stainless steel,etcPlating:Zinc plated ,nickel plated ,cooper plated ...