1、3 track lengths(50/40/30cm) for your option. 2、High quality aluminum alloy body, can support 2-5kg load. 3、Sliding plate with 1/4\" screw and 3/8\" convertible screw , you can mount ball head on it easily. 4、4 high precision bearings guarantee super smooth and silent sliding effect. 5、There are several 1/4\" \u0026 3/8\" thread for you to mount multiple video accessories such as tripod, LED light, Monitor, mic \u0026 so on. 6、3 track lengths(50/40/30cm) for your option. High quality aluminum alloy body, can support 2-5kg load. 7、Sliding plate with 1/4inch screw and 3/8inch convertible screw , you can mount ball head on it easily. 8、There are several 1/4inch \u0026 3/8inch thread for you to mount multiple video accessories such as tripod, LED light, Monitor, mic \u0026 so on. 9、You can screw the non-slip rubber foot to slightly adjust height. Sent with a portable carry bag for outdoor photography. 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. 1 * Slider Track 2 * Wrench 1 * Carry Bag Note: Ball head and phone clip are not included.