FEFCO 0400 Series
FEFCO 0400 mailers, trays, folders, and wraps
0400 is the broad one-piece folder family: mailers, trays, book wraps, hinged packs, produce trays, wraps, and display-friendly cartons.
Many 0400 products are cut from one board blank and folded into shape. The useful differences are in the hinges, locks, side walls, cover panels, and how the product is loaded.
0400 products
Mailers, trays, folders, and wraps
Grouped by package use: flat folder, wrap case, mailer, tray, produce tray, or machine-formed tray.
Flat folders and book wraps
Folder-style corrugated blanks for books, flat goods, framed items, and variable-height products.
Five-panel and wrap-around cases
Wraps and five-panel folders where the board folds around the product rather than forming a regular carton.
Mailers and folder packs
Hinged mailers, presentation packs, pizza-style boxes, and folder packs for products loaded from above.
Open trays, tray bases, and lids
Open trays, lids, tray bases, and shallow folded packs for product handling, retail, food, or assembly work.
Retail and produce trays
Tray designs for visible products, produce, bakery, pallet display, or shaped handling needs.
Glued, leak-control, and machine-formed trays
Tray formats where sealing, forming method, or product containment is the main reason to compare designs.
Series details
Common 0400 details
0400 products can look similar in a small drawing but behave very differently once loaded. Hinges, front locks, side walls, dust flaps, board grain, and setup method matter.
Hinges and fold order
The same blank can feel easy or awkward depending on which panels fold first and where the hinge carries stress.
Locks and closures
Tuck tabs, front locks, friction lids, glue, tape, and outer seals each change opening, security, and packing speed.
Side-wall strength
Single-wall trays, rolled edges, double side walls, and corner locks change stacking strength and product containment.
Product loading
Some 0400 products suit hand loading from above. Others need forming, glue, or equipment-friendly blanks.
Questions
Common 0400 questions
Why are there so many 0400 products?
0400 covers many one-piece folders, wraps, trays, and mailers. Small changes in locks, side walls, hinges, and fold order can change how the pack performs.
Can a 0400 product be used as a shipper?
Some can. Others need tape, a seal, an outer carton, or a master case. Product weight, closure, and handling method decide the answer.
How is a mailer different from a regular slotted carton?
A mailer usually folds around the product from a one-piece blank with a hinged lid or locking front. A slotted carton closes with top and bottom flaps.
Can 0400 trays be used for retail or food products?
Often, yes. Tray depth, corner strength, ventilation, print area, and whether the product is hand-packed or machine-packed all matter.
Do folder packs need a sample before production?
A physical sample is useful when fit, fold order, locking, or presentation matters. A drawing or photo can still start the first quote conversation.
What should I send for a tray, mailer, or folder request?
Product dimensions, quantity, loading method, shipping or display use, and any current sample or photo are enough to begin.
Need a mailer, tray, or folder quoted?
Send the product size, quantity, and how the pack will be shipped, displayed, or handled. Add a photo, drawing, old quote, or current package if you have one. We take it from there.