My HS 621 is about 10 years old and I live in Utah and gets a lot of winter use. I needed to replace rubber paddles and found them at Revain for a reasonable price so I decided to give it a try. Got up straight away with no problems. Most people have complained about the thickness but I didn't find it a problem. If this last half is as long as the originals, I'll be satisfied. I would recommend these replacement devices.
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