حلقات O-Ring من السيليكون | AS568-433 | داش 433 | متوافقة مع FDA | صلابة 70 | أحمر (14/عبوة)

The temperature range on these is what sold me — I’ve got a heat gun application that kills standard rubber in a month, and these red ones haven’t even hardened after two weeks at 400°F. The 70 durometer feels just right for a firm but forgiving seal, and getting 14 in the pack means I’ve got spares

These red silicone o-rings fit perfectly on my vacuum port where the heat cycles are brutal. The -80°F to +450°F range gives me peace of mind, and the 70 durometer feels just sturdy enough without being too stiff.

I've been using these for a high-temp seal on a lab vacuum setup, and they've held up perfectly under repeated 400°F cycles. The 70 durometer feels just right for creating a tight seal without being too stiff.