What's in the box:

Andoer QR-50 Quick Release Plate Clamp Adapter with Built-in Bubble Level for Arca Swiss RRS Wimberley Tripod Ball Head (2)

With standard 1/4" threads, scale plate and built-in bubble level, very convenient for use. Jaw can be opened from 37mm to 42mm, suitable for any Arca style plate such as RRS, Wimberley, Jobu Design, Arca Swiss, Kirk, Markins, etc.

Features:
Made of aluminum alloy, very durable and sturdy.
Standard 1/4" threads, can be directly mounted on 1/4" thread of devices.
Fast loading base with antiskid lock function.
With scale plate and built-in bubble level, very convenient for use.
Jaw can be opened from 37mm to 42mm, suitable for any Arca style quick release plate.

Specifications:
Material: Aluminum Alloy
Color: Black
Item size: 7.8 * 5 * 2.0cm / 3.1 * 2 * 0.8in
Item Weight: 88g / 3.1oz
Package Size: 8 * 5 * 3cm / 3.1 * 2 * 1.2in
Package weight: 91g / 3.2oz

Package List:
1 * Clamp for Quick Release Plate
1 * 1/4" Screw