This professional-grade extension column is designed specifically for EQ6 equatorial mounts, providing essential height adjustment for improved astronomical observation and photography. The metal construction ensures durability and stability during extended viewing sessions. With easy installation that requires no additional tools, this accessory seamlessly integrates with your existing telescope setup. Specification: - Material: Metal Size Chart: 200mm: 124mmx124mmx223mm/4.88inchx4.88inchx8.78inch 300mm: 124mmx124mmx323mm/4.88inchx4.88inchx12.72inch Package Includes: 1x Equatorial Mount Extension Column Note: Please allow slightly errors 1-2cm/0.39-0.79inch differences due to manual measurement.