1) BS1139 Standard swivel scaffolding coupler 2)for 48.3mm OD scaffolding pipe ... type,American type,Japanese type,Korea type,Germany type,Italian type and others as customer's drawing and sample standard.Other way ... and partners sincerely.Our principle:Customer First ,Service Foremost . BS1139 Standard Swivel Scaffolding Coupler For 48.3mm OD pipe