Neewer&reg; Professional Tabletop Mobile Rolling Slider Dolly Car Skater Video Track Rail for Digital SLR Cameras & Video Camcorders/LED Lights / flash light (Lake Blue) Aluminum Alloy Platform with Super Steady and Firm Rubber Wheels Mini size with articulating design, Lightweight and convenient to carry Wheel-to-wheel distance: 95mm Body middle width: 40mm Body length: 150mm