Type 6 photon torpedo
The type 6 photon torpedo was a type of photon torpedo used by  starships. The  was also equipped with this type of torpedo. ()

The specs for this type of photon torpedo were as followed:

 Body: 210 cm long and 76 × 45 cm across
 Weight: 247.5 kilos when not loaded
 Warhead: maximum of 1.5 kilos of antimatter
 Mid-range yield: 3,500,000 kilometers
 Blast zone: 300 kilometers
 Guidance system enabled
 Speed up to vmax = vl + (0.75 vl / c) 

In 2370, B'Elanna Torres programmed the Cardassian ATR-4107 shields to adjust to all known weapons, including those used by Starfleet. When she last accessed the missile on stardate 47582, the , which was equipped with this type of torpedo, was not in service. 

In 2372, Voyager attempted to disable the missile's drive systems with torpedoes. As the torpedoes approached the missile, it scanned the weapons and adapted its shields. The torpedoes exploded harmlessly against the shields and the missile was undamaged. ()

See also  
 Class 6 warhead
 Class 9 torpedo
 Class 10 photon torpedo
Explosive weapons
Classifications