The iOptron 126mm Dovetail Plate was originally intended for the iOptron iEQ45 Dual Saddle, but it also fits any iOptron mounts as well as a wide variety of other mounts that accept a Vixen-type plate that is 1.75" in width. The dovetail plate is crafted from black-anodized aluminum for enhanced durability. The #8422-126 plate is 5" long and is drilled with four M5 and two M6 threaded holes.