Ideal for generating gradients of polyacrylamide, sucrose and cesiium chlorideMilled of heavy acrylic plastic with high quality, leak-free Teflon valvesFlat base provides stability on magnetic stir. Comes with a support rod for attaching to a ring standTakes Luer or 4 mm ID tubing. With included adapters, can also take 2 mm ID or 22-gauge tubing.SG15, SG30, SG50 and SG100 include:Gradient Maker with Teflon Valves; Adapter Barbed Fitting; Luer Outlet Fitting; 22-gauge Needle; Support RodThe 500 ml SG500 Gradient Maker is made of two cylindrical acrylic chambers joined and mounted on a flat acrylic base.An easy-to-use push-pull valve opens and closes the passage between the reservoir and mixing chambersSuitable for forming polyacrylamide gradients or buffer gradients used with medium to small chromatography columnsIdeal for use with the SE615 Multiple Gel Caster SG500 includes:Gradient Maker with Push-Pull Valve; Hose Clamps (4 pieces)