Just completed the project yesterday with two gas shocks. One for the medicine cabinet and the other was for the door above the fridge on our '16 25' FB. The installation process was very easy. Directions are a bit weird, I suppose due to translation from Chinese to English and dimensions were in millimeters, but overall it was flawless.
My initial concern was that the medicine cabinet door would be to heavy and need two shocks, but one holds the door up nicely. The door over the fridge is a bit stiff and i would recommend using the next size down from the same company.
Amazon sells them in pairs, so if you want to hold up the medicine cabinet door and settle for the stiffness over the fridge, these are the ones to order.
Apexstone 100N/22.5lb Gas Struts/Gas Springs/Gas Strut Lift Support/Gas Shocks Lift Lid,Set of 4