Create a stronger seal than metal or rubber alone. These one-piece washers are metal for strength with a bonded rubber seal that creates a tight grip. Made of neoprene, the seal has good oil and abrasion resistance. Washers are reusable.

304 stainless steel washers have good chemical resistance and may be mildly magnetic.

Type of Stainless Steel:
201 Stainless Steel (SUS), suitable for use in a dry environment, it is easy to rust with water.
304 Stainless Steel (A2), outdoor or humid environment, resistant to corrosion and acid.
316 Stainless Steel (A4), added molybdenum, more corrosion resistance and pitting resistance, especially suitable for seawater and chemical media.

The data is a single batch, manual measurement, there are errors!
The color of the photo may have a color difference due to the monitor!