Colgate Optic White Purple Serum 40ml New. For better teeth whitening, it works to correct yellowing tones in teeth. A set of three toothbrushes, shown in the second picture. Its price in pharmacies and websites is 120 riyals per piece. The toothbrush set is sold for 23 riyals. Selling price 55 ⃁ per piece Two pieces 110 + toothbrush set Only two pieces available