When sourcing 25-shot cake fireworks, you must prioritize Tube Diameter (Inner Bore), as this determines the height and spread of the effect; typically, 20mm to 30mm is standard for consumer-grade cakes. Additionally, verify the Net Explosive Content (NEC) or powder weight to ensure it meets your market's power limits. The Duration should be clearly defined (e.g., 20-30 seconds) to match the intended display rhythm, and the Effect Variety (such as peony, willow, or crackling) should be confirmed via high-definition Product Demo Videos provided by the exporter.