S.I. Feeders Products In Stock Used 2017 S.I. Feeders AF24 Have a total of 4 used feeder wagons. 24' feet long. Nice! Call Denton or Angie for details. 800-669-6450 $4,650 New 2019 S.I. Feeders 24FT ARROW FRONT THE ORIGINAL HAY FEEDER TRAILER!!!!!THE BEST MONEY CAN BUY!!!CALL FOR PRICES. 800-669-6450 $6,100 Hay Wagons S.I. Feeders Arrow Front Feeders20' / 24' / 32' Other sizes and models also available, including Pan Bunks, One Sided Bunks, Trailer Bunks.