FP-DI-This stainless steel pump is designed for dispensing directly from a standard deep fountain jar. This pump is designed for use in a drop-in slanted rail or countertop cutout with a 22 degree angle. Afountain jar is not included. The pump dispenses a 1 1/4 oz (37 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 1/4 oz (37 mL) maximum portion, now adjustable in 1/8 oz (3.7 mL) increments -- allows for Portion Optimization , With higher discharge tube for dropping into countertop