A tube holder does exactly as the name implies...it holds the tube in a clam-shell-like ring so that the optical tube assembly can be mounted to a Takahashi mount.

In this case, the Takahashi TOA-130 Tube Holder was designed specifically for the Takahashi TOA-130s and TOA-130f refractor telescope and it will cradle your baby with its non-marring lining. The ergonomic fittings mean an easy grip with one hand for opening and closing with ease. Matching paint means your whole Takahashi assembly has the perfect fit and finish!