... gels CE, FDA certified Safe & Easy to use OEM avalible Teeth Whitening Pen & Keep Bright Pen 2 ml 4 ml the customazied ... pens Offer OEM service,Design service High Quality, good effect Teeth whitening pen Customize any strength of gels includingCP: 17%, 22%, 35 ... the in-built brush. Brush onto front surface of the teeth. After 15 minutes brush gel off. 2ml 4ml Teeth Whitening Pen