KELVIN® sells CO2 cartridges separately (500025 or 500053). CO2 cartridges are dangerous and can be misused by students when unsupervised. KELVIN® recommends that teachers only provide CO2 cartridges during supervised competitions.
Wood blanks (poplar or pine) are 12 in. long x 1-5/8 in. wide x 2-3/4 in. rear height x 3/4 in. front height with PRE-DRILLED CO2 Cartridge Hole. Students must drill the axle hole in this blank.
