FP-200-This stainless steel pump is designed for dispensing directly from a standard shallow fountain jar. This pump is designed for use in a slanted rail with a 22 degree angle. The fountain jar shown is not included. The pump dispenses a 1 oz (30 mL) serving per stroke with the option to reduce the portion size in 1/8 oz (3.7 mL) increments, using the supplied gauging collars. When you place your order, be sure to request a colored knob engraved with your contents for a clean presentation. A black knob is standard. Standard features include: Stainless steel construction with captured valve balls to eliminate loss 1 oz (30 mL) maximum portion, now adjustable in 1/8 oz (3.7 mL) increments -- allows for Portion Optimization .