Socket Weld Spacer Ring Outside Diameter 2 in Thickness 1/8 in Material Water Soluble Composite Board Compatible Material Type Metal Features Eliminate Scribing Hollow Center Enables Viewing During Welding Reduce Cracked Welds Resistance Properties Marine Grade Chloride Corrosion Resistance Standards ANSI 31.1 ASME Section III US Navy and Military Codes Water Soluble Yes Package Quantity 50