When sourcing a 6kg washing machine, you must prioritize the Motor Type, specifically choosing between Universal motors (cost-effective) and BLDC Inverter motors (durable, quiet, and energy-efficient). Pay close attention to the Spin Speed, where 1000 to 1200 RPM is the industry standard for this capacity to ensure optimal moisture removal. Additionally, verify the Inner Drum Material, ensuring it is made of high-grade Stainless Steel with a 'pearl' or 'diamond' drum pattern to minimize fabric wear and tear.