Aquasil Ultra Cordless Tissue Managing Impression System – Tray Material, 4-Pack RefillAquasil Ultra Cordless Tissue Managing Impression System is a revolutionary retractionless impression system with digit power dispenser technology. This new, less traumatic way to record impressions doesnt use retraction cord or paste in most cases. The technique is simple, first use B4 pre impression surface optimizer to equalize surface tension. Second, just attach the digit power dispenser onto your dental unit and deliver the new Aquasil Ultra