Our Canon Pixma MG3120 ink replacement manufacturing process complies with the same original specifications and quality standards as the Canon PG-240 series and Canon CL-241 series. All of our products have undergone strict quality testing to ensure their reliability and stability. At the same time, we guarantee that our compatible ink cartridges can perfectly match your printer and output perfect printing results. And since you purchased our compatible ink cartridges, we have provided them with a 30-day refund guarantee and a two-year product guarantee. Therefore, please rest assured to purchase our Canon Pixma MG3120 compatible ink cartridges and enjoy high-quality printing.