Specifications: Vertical: 2 mm / 0.08 inch thick, 5.2 cm / 2.0 inch high, 5.0 cm / 1.9 inch wide, aluminium alloy with high hardness. Bottom: 1.5 mm / 0.059 inch thick, stainless steel. Centre tiered hole: diameter of approx. 17 mm / 0.6 inches. Motor mounting holes: 4 mm / (for M4 screws). Package contents: 1 x motor holder.