The centrifugal refinement of the liposuction-harvested adipocyte tissues removes blood products and free lipids to produce autologous breast filler. The injectable filler-fat is obtained by centrifuging (spinning) the fat-filled syringes for sufficient time to allow the serum, blood, and oil (liquid fat) components to collect, by density, apart from the refined, injection-quality fat.[113] To refine the fat for facial injection quality, the fat-filled syringes are centrifuged for 1.0 minute at 2,000 RPM, which separates the unnecessary solution, leaving refined filler-fat.[114] Moreover, centrifugation at 10,000 RPM for 10 minutes produces a “collagen graft”; the histologic composition of which is cell residues, collagen fibres, and 5.0 per cent intact fat cells. Furthermore, because the patient’s body naturally absorbs some of the fat grafts, the breasts maintain their contours and volumes for 18–24 months.