Size:250mm-600mm(10''''-24'''') Finishing:blue zinc-plated,color zinc-plated,black zinc-plated. Product features:fine adjustment of gap is possible when installing; quickseparation mechanism; vibration prevention ball strip for absorbing impulsive force. Installation method:side installation.12.7+0.2mm Recommended applications:mid-duty movable cabinet,desk drawer,ordinary furniure,or any applications requiring 40kg load or less and requiring full extension.