Kingfisher Heavy Duty Polypropylene Twine

To describe this as 'heavy duty' to my mind breaches the Trades Descriptions Act. I appreciate it's only string but I did a quick test when it arrived and was able to snap a length between my fingers with no more than about 10 kg of force. After exposure to UV light and the elements outdoors, expect the breaking strain to go south even more. Unless I got a dodgy roll, the review above that likens it to baling twine is nonsense.

It's very strong twine. I use it to support my tomato plants in my greenhouse. You need good quality and strength otherwise you can loose your crop due to twine failure.