Home Products grain drill parts marliss, m & w, sukup, remlinger seed tubes seed tubes 2 Available Products SALE GD8113 - Seed Tube 1-3/4" top & bottom opening. Length: 9-1/2" to 20". ... SALE U100 - Universal Grain Drill Tube 2" top I.D., 1-1/2" bottom I.D. Length: 10" to 26". ... 2 Available Products