S.U.R. & R. ABU400 Straight Union 1/2" Tube (2). S.U.R. & R. AC16M 16mm A/C Compression Union (1). S.U.R. & R. AC15M 15mm A/C Compression Union (1). About JB Tools. We reserve the right but are not obligated, to limit the sales of our products or Services to any person, geographic region or jurisdiction.