... double core tube syringe! Non peroxide teeth whitening gel,real zero peroxide gel ! 3ml, 5ml,10mlOur new non-peroxide gel' ... s PH value is 6~7, near water's PH, 7, coca cola's ... -5000 boxes 4,Oral spray, 5,Teeth cleaning liquid 6,Toothpaste 7,Gum barrier/ gum dam in 1-5 ml ... us if any question Non peroxide gel,peroxide free,zero peroxide,neutral PH.,3ml,,5ml,paypal is ok