2pack chromlives tripod nut barrel nut connection nut with 1/4''-20 thread hole for articulating magic arms tripod rigs replacement chromlives 2 pack of tripod nut with center 1/4"-20 thread for articulating magic friction arm.<br/> dimension:<br/> height:18mm <br/> diameter:17mm <br/> center thread type: standard 1/4"-20 thread <br/><br/> package includes: 2pcs of 1/4"-20 tripod barrel nut