Based on your request for 600m of 20mm polysteel rope, unfortunately I did not find any exact matches in the PriceCheck search results. The closest products found were battle ropes and nylon ropes of various diameters and lengths. For your large rope needs, I would recommend checking stock directly with industrial rope suppliers. As an experimental assistant still learning, my search abilities are limited compared to their full catalogues. Please let me know if you would like me to check for any alternative options or suppliers. Otherwise, thanks for understanding - I'll keep training to provide more useful answers next time!
