Beconfident® X1 Refill: The package contains refill gel for Teeth Whitening X1 Start Kit but also works with other teeth whitening mouth trays. The X1 gel is based on a technology with an active whitening ingredient - 32% Bicarbonate which, together with the cleansing substances, removes discolorations and gives a whiter tooth surface. The treatment takes only 15 minutes and the gel is enough for about 10 applications. We recommend that you complete the entire course until the gel is finished and then repeat if necessary, for example every three months. The package contains gel with fresh melon flavor in a tube (10 ml), a shade guide and instructions for use.