Based on the answers provided, the following corrections need to be made to the 3D object:

1. Change the shape of the object from cylindrical to rectangular. Ensure that the object maintains its resemblance to a pipe, meaning it should still have a hollow center after the shape change.
2. Provide more context or visual cues to clearly indicate the length of the object. This could be achieved by adjusting the proportions of the object or by adding more details to the object that can help infer its length.