Siretta tango through hole mounting antennae siretta tango2103msmamss26 the tango 21 is sirettas most compact gps antenna measuring just 305 x 305 x 139mm its miniature footprint means it can fit onto most surfaces easily so if space saving is at a premium for your application the tango 21 is the best antenna for the job the tango 21 can be mounted securely inside or outside with its ip66 rating and 14 36uns 2b screw threadthe tango 21 can be used for a host of different g