Hellermann tyton helagrip cable and wire marker cassette hellermann tyton mhg1 3cass the helagrip cable and wire marker cassette 1 3mm is a handy pocket sized cassette style dispenser which will make it easy for use on site work each kit contains the most commonly used symbols hellermann tyton mhg1 3cass helagrip cable and wire marker cassette 1 3mm