Complete rail system is made of Metal Color : knobs is blue and all other is black Rails length : 25cm Rails dia : 15mm Rails center-to-center distance : 60mm Camera height riser adapters legth : 85mm Thickness of height riser adapters : 8mm Lens support length : 65mm Tripod mounting plate length : 80mm Tripod mounting plate thickness : 20mm Screws thread : 1/4 & 3/8