ULD Container Types: M-6 Twin Car Rack
- IATA ULD code: PRA 16-ft flat pallet with twin car racks as VRA
- Prefixes: PMA, P4A, P4M, and PZA
- Rate class: Type 1P
- Description: Main-deck pallet with special moulding for car rack attachments. The support racks are available in pairs as IATA ULD code VRA.
- Suitable for: 747F, 747 Combi, 777F (center loading only) Maximum gross weight: 8,900 kg (19,621 lb), vehicle for upper rack must not exceed 1,800 kg (3,968 lb)
- Tare weight: 400 kg (882 lb)
- Car supports weight: 130 kg (286 lb) per pair
- Note: The same system is available for longer vehicles on 20-ft pallet. The only increase in weight is the pallet tare weight: 500 kg (1,102 lb).