حلقات O من بونا-ن نيترايل | AS568-461 | داش 461 | صلابة 70 | أسود (10 / عبوة)

The temperature range on these is what sold me—I needed something that could handle both hot and cold lines without hardening. Tested them on a water system that cycles between freezing and steaming, and they held their shape perfectly. Solid buy for the price.

The 70 durometer is stiff enough for my air fitting rebuild, and they fit perfectly on the first try. The temperature range was a key factor for me, so glad it's rated for both hot and cold.

Took a chance on these for a small repair job and they fit perfectly right out of the pack. The 70 durometer feels just right for the application, not too stiff or soft.