|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.|
Pre-drilled wood blank has a CO2 cartridge hole ONLY. 1-1/2 in. wide with a front height of 3/4 in. and a rear height of 2-3/4 in.
PLEASE NOTE: Requires CO2 cartridge. Students must drill the axle hole in this blank.