<►> S - "Single" flange For rectangular/square based 50ml cartridge systems. Lightweight - Molded From Glass Reinforced ABS. .2.5Kn (250kgf) .Manual .50ml 1:1, 2:1, 4:1, 10:1 - 75ml 1:1 - 25ml 1:1 .Bead .240g .13:1