The Opteka GLD-55 is a Camera Slider is with a unique curved circular track designed to give you the ability to create Hollywood-quality production shots perfect for beautiful cinematic moments. The GLD-55 features a heavy-duty anodized aluminum sliding track, bearing based camera sliding platform, tension adjustment, height adjustable feet, stoppers, 1/4" & 3/8" thread compatibility. Specifications Track Length: 33" (85cm) Materials: Anodized Aluminum Compatible Thread Sizes: 1/4" and 3/8" Tripod Compatible: Yes Swivel/Pan Head Compatible: Yes Dimensions (LxWxH) (Track only): 33" x 2.5" x 0.5" (60cm x 6.3cm x 1.25cm) Weight: 4.5 lbs (2kg) What"s in the Box ~ 33" Camera Sliding Rails ~ Camera Mount Platform ~ Feet X 3 ~ Adjustable Legs X 6 ~ Hex Screws X 6 ~ Stoppers X2 ~ 1/4" to 3/8" Thread Adapter ~ Allen Key ~ Carrying Case ~ Product Guide