... easy to refill Never leakAbout Coolcolor 's other different designing CISS INK TANKS,we give introduction here ,specially ,our Luxury tanks are ... from China intellectual Property Bureau .1.Coolcolor Technology "Luxury tank-1"ink tank was applied patent from China Intellectual Property Bureau ,its patent ... D2,ABS-E,PP-F,PP-F2,ABS-L,ABS-L2,Luxury tank-1,Luxury tank-2. And we will continue to researching ...