As a suggestion, if you supplied two 1 inch stems; one 3 inch; one 7 inch and then two 12 inch stems, one could basically create a stem (not including the fixture nor the top housing) that has every inch covered from 1 to 36 (other than 6 inches) . In your current line-up one is limited to 4 inch increments...4;8;12;16;20;24;28;32;36 As you know, when placing a pendant over an island, a 4" difference might be too great.