After receiving an altimeter from a donor, the we had to decide which rocket to put the altimeter in. The rocket selected had to have a stable record, so the chances of the rocket being lost were minimal. If the rocket were lost, not data concerning the altimeter would be gathered.
After all of the criteria was decided, the YP rocket was selected to hold the altimeter, because there is ample space in the fuselage to hold the altimeter. Fortuna 4 was also considered it was originally thought that the altimeter would fit in the payload area, but after closer examination, it was decided there was not enough room.
The altimeter that was gifted was a stock Estes Altimeter. Some specifications of it are below.
Weight: 11.66 grams
Length: 5.5 cm.