Paper and ink.
If you choose to have a poster hanger then it will come in the tube with your rolled print. The wooden hangers are made of soft obeche, a solid natural uncoated wood, and are magnetic. They have a tapered egde and use silver hoops to attach the white string for hanging. (See close up photographs for examples).
Prints measure H30cm x W21cm (A4) and H42cm x W30cm (A3).
Wooden hangers measure 1.8cm wide, 0.6cm deep and comes in two lengths: 21 cm (A4) 30cm (A3).