حلقات O من السيليكون | AS568-904 | داش 904 | متوافقة مع FDA | صلابة 70 | أحمر (400 / عبوة)

The 70 durometer on these feels just right for my industrial seals; they seat perfectly without being too stiff. Had to replace some old black ones, and the red color actually makes it easier to spot leaks during inspection.

Finally found a red o-ring that handles the high-temp sterilization cycles in my lab without degrading. The -80°F to +450°F range covers everything I need, and the 400-count package means I won't run out soon.

The 70 durometer feels just right for my hydraulic fittings — firm enough to seal without being a struggle to install. These 904s held up perfectly when I tested them in a hot oil bath around 300°F, no leaks at all.