Unscrew the barrel from the pen body. Push the silver ball-side of the refill cartridge firmly onto the pen body. Make sure the cartridge fits with no gaps. (You may have to use a little force).
Reconnect the pen body to the barrel. Hold the pen with the brush tip facing down until the brush is saturated with ink. Shake gently to resaturate the brush with ink before each use.
Water, Butylene Glycol, Ammonium Acrylates Copolymer, Beheneth-30, Phenoxyethanol, Methylparaben, Ethylparaben, Sodium Hydroxide, Simethicone, Sorbitan Palmitate. Sorbitan Laurate, Hydrogenated Palm Glycerides, Sorbitan Trioleate, Sucrose Palmitate, Black 2 (ci 77266).