Color: Silver Material: aluminum alloy Fast aluminum alloy wash out + 2 wires, strong / reliable / beautiful. Scope of application: Can be used on a variety of pan / tilt boards. Most domestic guide mirrors / finder holders are mostly suitable for any type of Takahashi astronomical telescope Dovetail slot: Top edge width: 24mm Bottom edge width: 34mm Middle opening Length: 34mm Height: 28mm Suitable for M5, M6, 1/4 hex screws Package include: 1 x Dovetail Slots 2 x Screw Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.