BOpteka GLD-1200 PRO-Series 47" Camera Slider Track System with Roller Bearing Platform ReviewbP PP Opteka GLD-1200 PRO-Series 47" Camera Slider Track System with Roller Bearing Platform P47" (120cm) Long sliding track creates beautiful cinematic momentsPHeavy-duty anodized aluminum constructionPBearing-based camera sliding platformPTension adjustment; Adjustable legsP38" Mounting thread with 14" thread adapterP