J CURL Lashes 0.20 (volume) 13mm black (approx 2,960) is a volumising lash extensions with adhesive peel-off strip for fast, easy application. 9mm length, J curl, 0.20 thickness. Black. Synthetic hair. And as for that perfect combination of exceptional quality, easy to use products and stunningly effective results… Salon Systems has lashed, waxed and nailed that too.