ProAm USA SimpleSLIDER Compact Camera Slider Dolly Compact 24 inch slider dolly for camera loads weighing up to 3 lbs. Smooth nylon guides that slide along the anodized aluminum rails. Includes 24" rails, camera platform, two height-adjustable ends. Rails are fixed to the platform giving it extra strength and rigidity. Multiple mounting holes underneath for attaching to tripod heads using 1/4-20 or 3/8-16 screws.