Comparison : Item # SS-6-MTA-1-4W, Weld Adapter - Metric (Swagelok Port to Pipe)
Item # SS-8-MTA-1-4W, Weld Adapter - Metric (Swagelok Port to Pipe)
Item # SS-10-MTA-1-6W, Weld Adapter - Metric (Swagelok Port to Pipe)
Item # SS-12-MTA-1-8W, Weld Adapter - Metric (Swagelok Port to Pipe)
Item # SS-18-MTA-1-12W, Weld Adapter - Metric (Swagelok Port to Pipe)