The downpipe is used to lead the water in a controlled manner to a shoe in order to lead the water away from the foundation of the house.
The intermediate pipe is a short downpipe. You use it as a fitting between the gutter and the wall where you have the downpipe.
The pipe bend is used as a connection to the gutter outlet and also between the intermediate pipe and downpipe by the house wall.
The pipe wrap is used to keep the downpipe in place by the wall.
Nail & screw for stone wall
Nail and screw are used together with pipe wrap stone to secure the pipe wrap in a concrete or brick wall.
The pipe branch is used to connect two downpipes from different roofs from e.g. a porch.
The shoe is used to throw the water onto the ground away from the building foundation.
The drain shoe is used to lead the water into a ground drainage by the house wall.
The fold-out shoe is used to save the water for use in watering, by collecting it in a barrel.