Scribner Plastics shipping container (requires insert) features interlocking and stackable Go Kart engine storage and shipping cases. These are manufactured of polyethylene to provide maximum protection to the engine during shipment. The case holds the motor upright, making it easier for engine maintenance and the square design maximizes your usable space. The standard color for all engine and specialty containers is grey. These can be cleaned in "Hot Wash" systems set to 140 degree Fahrenheit or less and are designed to last many shipping cycles. Scribner Plastics has provided professional strength engine containers to the racing industry for over twenty five years. Requires insert.