The disposable tips have an inner core water chamber that seats into the syringe, eliminating water contamination in the air chamber. WE CAN SUPPLY AND INSTALL ANYWHERE IN NIGERIA OFFICES IN LAGOS, ABUJA, PORT HARCOURT AND BENIN CITY Please CALL: 0907-643-3020, 0904-936-7703 WhatsApp: https://wa.me/2349076433020 Email: info (AT) scantrikmedicalsupplies.com Web: www.scantrikmedicalsupplies.com/products