These elastic extensions have been specially designed to hook onto and extend the velcro strip of the MOBILIS® smartphone & handheld devices arm band (030003 : smartphone holder 4-6'' & 030004 : HHD holder 5-7''). They are 140 mm long & expandable (elastic velcro). With this extension, the supports are adapted to all morphologies, and can be worn on clothes. Sold in pack of 10.