What's in the box:

Andoer 30cm/12inch Aluminum Alloy Camera Track Slider Video Stabilizer Rail for DSLR Camera Camcorder DV Film Photography, Load up to 11Lbs (3)

Features:
3 track lengths(50/40/30cm) for your option.
High quality aluminum alloy body, can support 2-5kg load.
4 high precision bearings guarantee super smooth and silent sliding effect.
There are several 1/4" & 3/8" thread for you to mount multiple video accessories such as tripod, LED light, Monitor, mic & so on.
You can screw the non-slip rubber foot to slightly adjust height.
Sent with a portable carry bag for outdoor photography.

Specifications:
Brand: Andoer
Material: Aluminum Alloy
Size: 50cm/20inch, 40cm/16inch, 30cm/12inch (Optional)
Track Width: 5cm / 2inch
Plate Size: 8.9 * 8.9cm / 3.5 * 3.5inch

-50cm
Item Size: 52 * 7.5 * 5cm / 20.5 * 3 * 2inch
Item Weight: 840g / 1.8Lbs
Package Size: 56 * 12 * 8cm / 22 * 4.7 * 3.1inch
Package Weight: 1200g / 2.64Lbs

-40cm
Item Size: 42 * 7.5 * 5cm / 16.5 * 3 * 2inch
Item Weight: 750g / 1.65Lbs
Package Size: 46 * 12 * 8cm / 18 * 4.7 * 3.1inch
Package Weight: 1030g / 2.27Lbs

-30cm
Item Size: 32 * 7 * 5cm / 12.6 * 3 * 2inch
Item Weight: 679g / 1.5Lbs
Package Size: 36 * 12 * 8cm / 14 * 4.7 * 3.1inch
Package Weight: 870g / 1.9Lbs

Package List:
1 * Slider Track
2 * Wrench
1 * Carry Bag

Note:
Ball head and phone clip are not included.