Ideally we require in PDF format but if you cannot produce this please send what you have and we will see if we can use.
Colour please check you have used CMYK colours. RGB files may not print properly. Also if you have used any spot colours please convert these to CMYK.
Bleed is required for trimming. 4mm each side is preferred.
Crop marks are required to trim. We have computer controlled cutters that use these to trim printed products.