Fast acting peroxide gel removes years of stains quicklynOver 60 whitening applicationsnThick and high viscosity formula to prevent moving in traysnThese are huge 10ml syringes - other sellers give smaller syringes and make it look like morenWritten instructions and shade guide includednThese are 10mL with over 60 whitening applications. Thick, high viscosity formula to prevent moving in trays. Huge 10 ml syringes. Our product is made in the United States. Written instructions included. Free shade guide.