ULD is the abbreviation of Unit Load Device, which is a container used to load cargo in air transport. It can be a container, a pallet or a net. The specifications of air carriers are subject to the model of the aircraft. All carriers of full-cargo aircraft can be used, while passenger aircraft can only use pallets and containers. Due to the size limit of the carrier, when we accept air cargo, we can only accept goods within the size range allowed by the carrier. If the size exceeds the limit, we can only use other transportation methods to solve it, such as sea containers or roll-on/roll-off ships.Below are some common carrier specifications: 1.) P1P/PAG pallet Bottom size: (L)317.5CmX(W)223.5Cm; Board weight: 110kg Maximum load-bearing capacity: Low board: 4,626kg, High board: 6,000kg IATA code: PIA,PIC,PID,PIG,PIP,PAG,PAJ,PAP,PAA,PAX Applicable models: A300, A310,B747,B767,B777,A340 2.) P6P/PMC pallet Bottom size: (L)317.5CmX(W)242.8Cm; Board weight: 120kg Maximum load-bearing capacity: Low board 4,626kg-5,035kg (depending on the airline), High board: 6,800kg IATA code:P6C, P6P, PQP, PMC, PMP Applicable models: A300, A310, B747, B767, B777, A340 3.) PGA pallet Bottom size: (L) 605.8cm x (W) 243.8cm; Weight: 540kg Maximum load: 11,300kg IATA code: P7A, P7E, P7F, PSG, PGE, PGA Applicable models: B747-MD (cargo plane) 4.) LD3/AKE/AVE box bottom size: (L) 156.2cm x (W) 153.4cm; Top size: (L) 200.6cm x (W) 149.4cm Weight: 82kg Maximum load: 1,587kg IATA code:AVA,AVB,AVE,AKE,AVM,AVN,RKN,RVB,RVE,RVN Applicable models: A300,A310,B747,B777,A340