I was talking to someone Saturday about the different lengths on the J-teks we had seen. Oddly enough I just ran across a posting of part numbers and the lengths of the leads....

Part Number Lead Length
J-Tek1 12" (30 cm)
J-Tek2 24" (61 cm)
J-Tek3 36" (91 cm)
J-Tek7 80" (203 cm)
J-Tek10 114" (289 cm)
J-Tek12 163" (414 cm)
J- Tek15 199" (505 cm)

J-Tek Match Head Technical Information
Part Number
J-Tek
Bridge Wire Resistance' 1 ohm ± .2 ohms
Maximum No-Fire Current; .30 amp
Minimum All-Fire Current; .75 amp.
Recommended Min. Firing Current; 1.00 amp
Recommended Nominal Firing Current; 1.25 amp.
Maximum Test Current; .04 amp

Part Number; M-Tek I doubt anyone gets these here.
Bridge Wire Resistance; 1 ohm ± .2 ohms
Maximum No-Fire Current; .30 amp.
Minimum All-Fire Current; .50 amp.
Recommended Min. Firing Current; .75 amp.
Recommended Nominal Firing Current; 1.00 amp.
Maximum Test Current; .04 amp.

Quick way to tell is the J-tek has red heads, M-tek brown and larger in diameter head. Tim sells J-teks, but I'm not sure if he gets Ms, I didn't ask. Someone else can pipe up on this one...

Greg