The total Length: 12.8cmMaterial: PlasticShell Color: Green， red， yellow and blueLiquid Color:BlackLiquid filled， click-action， syringe shaped ballpoint pensCome with fluid measurements on one sideAlso refillable! Just unscrew the bottom， pop in a re-fill and you are setGreat for children who are afraid of shotsMake great gifts for doctor's， nurse， dentist， office workers， Halloween， etc.