This abstract involves PVC black cables, covering two models: Cyky and Cyky-J, as well as specifications such as 5X50mm, 5X6mm, 5X2.5mm, and 4X16mm.​ In terms of specifications, the number before "X" represents the number of conductors, and the number after indicates the cross-sectional area of a single conductor (unit: millimeters). For example, 5X50mm means it contains 5 conductors of 50mm², with strong current-carrying capacity; 5X6mm includes 5 conductors of 6mm², suitable for medium-power scenarios; 5X2.5mm has 5 conductors of 2.5mm², applicable to low-power equipment; 4X16mm contains 4 conductors of 16mm², which can meet specific power transmission and distribution needs. Different specifications intuitively reflect the current-carrying capacity through the combination of the number of conductors and cross-sectional area, facilitating selection according to power consumption capacity.​ In terms of models, both Cyky and Cyky-J are designed based on PVC material. Cyky-J may have optimizations in structure or protective performance, such as enhanced wear resistance or tear resistance. The PVC black sheath has good mechanical protection and weather resistance, and the black color can reduce heat absorption from sunlight, making it suitable for outdoor or industrial environments.​ This series of cables is applicable to scenarios such as industrial equipment power supply, building power distribution, and outdoor small facility wiring. With diversified specifications and PVC material characteristics, it meets the power transmission needs of different powers and environments.​