Holman Shelf Riser Kit Model 48401Holman Shelf Riser Kit Model 48401 Set of two risers to create more aisle space along the floor of a van. When all the shelves in a vehicle are using this kit it allows sheet goods to be stored on the floor of the cargo area that otherwise might not fit. FEATURES AND BENEFITS: Creates a gap that is 6. 25 wide and 4 high on the lower front part of the shelf, while increasing the height of the shelf by 4. Allows for 49. 5 sheet goods to be stored on the