*Enjoy reduced shipping fee when you shop multiple items at our Pricetronic store. BIGEN 美源髮采 Japan No.1 Hair Color Conditioner With Natural Herbs #881 Natural Black#882 Brownish Black #883 DARK BROWN Bigen Speedy is excellent for darkening grey hair to meet your needs: Moderate Darkening Grey hair can be significantly darkened in just 5 minutes. Gradual Darkening Grey hair can be gradually darkened bia repeated application with shortened color developing time. Perfect Darkening Grey hair can be perfectly darkened by extending color developing time to 10-15 mintues.