Flexmaster Joints Conveying Products 4.Notchedchannelringwhichgripspipefirmlytorestrict movementalongpipeortubing. Standard Features Flexmasterjointsarecurrentlyinuseinthousandsofappli- cationsthroughouttheworld.FortypicalFlexmasterjoint applicationsseephotosonpage2. Self-Restrained Features 2.Hingedcouplingprovidesforquick,easyassembly. 2.Hingedcouplingprovidesforquick,easyassembly. 3.Bulgedsleeveallowsfor±4ºangularmisalignment.