There is a pin on the side of the VectorFog DH1 Gel Bait Gun that can be pulled out and adjusted to release the amount of bait gel you would like to apply to a particular area. The settings are "L" for low dosage and "H" for high dosage. This is the only way the amount of bait gel can be measured with this bait gun.
The VectorFog DH1 Gel Bait Gun, as all bait guns, does not come with any bait. This gun can be used to apply most gel baits that come in 30-35 g tubes.
The VectorFog DH1 Gel Bait Gun handle assembly is a sturdy plastic and the rod is made from Japanese steel.