Lawn Tractor Lawn Sweeper Attachment Hopper Height Adjustment Tube. This hopper height adjustment tube (part number 24191) is for lawn tractor lawn sweeper attachments.Hopper height adjustment tube 24191 attaches to the hopper bag frame to raise or lower the hopper bag height.Wear work gloves to protect your hands wh... - Lawn Tractor Lawn Sweeper Attachment Hopper Height Adjustment Tube.