To determine how many stickers you should get, you need to know the volume of the area you want to protect. A cabinet, panel, or other type of box may have a label on the door or somewhere inside with the volume printed on it.
If you don’t see the volume printed anywhere, that’s okay. Multiply the unit’s height, width, and depth to find its size in cubic inches (H x W x D = in3), then plug that number into this calculator to find your volume.
Now you can choose the right model for your needs. Make sure you go up a size if your number falls between two models. Example: An electrical panel with an internal volume of 30 liters needs FSS 40L because that model covers 30 liters.