ALP: LD4 without forklift holes AMA: M1 container AMD: M1H container AMJ: LD7 container (), tall, contoured for main deck wide-body (aka M1) AMU: LD39 container contour similar to ALF, but deeper and bigger extensions. biggest lower-deck container AVY: LD1 with forklift holes AWC: LD6 with forklift holes AYY: Demi, a half-width contoured container typically used for the main deck AYX: AYY with fittings to connect a fire extinguisher so as to carry Dangerous Goods DPE: LD2 without forklift holes DPN: LD2 with forklift holes DQF: LD8 with forklift holes FLA: LD11 pallet FQA: LD8 pallet (same floor dimensions as DQF) HMA: Horse stall KMA: Sheep and goat pen P1P: LD7, large pallet (), folding wings for overhang PAD: LD7, large pallet (), flat PGA: M6, large pallet (), freighter main deck only PLA: LD11 pallet PMC: LD7, large pallet () QKE: LD3 same as AKE but made of KEVLAR and designed to be bombproof. No forklift holes. RAP: LD9 with refrigeration unit RAU: LD29 container with refrigeration unit RKN: LD3 with refrigeration unit RWB: LD11 with refrigeration unit SAA: Full-sized version of the AYY SAX: Full-sized version of the AYX VRA: M6, large pallet (), twin car rack XAW: LD7, large pallet (), fixed wings for overhang XKC: LD3 without forklift holes/half ALF Main-deck ULDs On the main deck of cargo planes are tall ULDs with footprints similar to those of or wide pallets and or long. A wide × tall ULD is half the volume of a × 88 inch pallet. The 20 foot pallet is long and wide. What the actual dimensions of contoured upper deck ULDs are is very hard to know, because most manufacturers only profile width, length and height data. There are several common types of contoured main deck ULDs, that are contoured (curved to fit in the plane's body) to provide as much cargo volume as possible. Initially ULD contouring was simply a triangle removed from one or two corners of the profile of the ULD, such as the common LD3 and LD6. Main deck ULDs use curves for the contoured shape to truly maximize cargo volume. Upper deck ULDs are just like lower deck ULDs that are either the full width of the plane with two corners of the profile removed (lower deck LD6 lower), or that container is cut in half, down the center line of the plane, (lower deck LD3