MDI
Modern demolition initiator
Components of of non-electric firing system
Initiator (typically M60)
Time fuse (typically M700)
Non-electric blasting cap (typically M7)
Components of an electric firing system
Power source (typically CD450) Firing wire Electric cap (typically M6)
Fuse Ignitor
M60 is used for non-electric firing system.
M81 is used for MDI