Image 1 of 2 Image 2 of 2 1:87 HO Scale Material Rack (2pk) $8.00 Unpainted, 3D printed material rack for HO Scale scenery. Package includes two unassembled material racks. Quantity: Add To Cart Added! Unpainted, 3D printed material rack for HO Scale scenery. Package includes two unassembled material racks.