This combo package is only necessary if you have very thick walls, thick door jambs, and/or thick trim.
Measure First Before You Order
You need these only if the measurement from your door jamb (the ridge against which your door closes) to your outer trim is between 17 cm and 22 cm or from 6 3/4 and 8 3/4 inches. They come in sets of two so ordering one of these items in your cart will result in 2 being delivered, one for each side of your Gorilla Gym core unit.
If the distance is greater than 22cm (8 3/4″), then the Gorilla Gym will not fit securely in that doorway at this time.