304 grade are great pegs that will last longer in the face of constant weathering. Due to the peg's nickel content being twice as high as the normal 201 stainless steel pegs, they have a greater corrosion resistance. The lower carbon and manganese content also make them more durable and less prone to rust. Here's a guide to choosing the best grade of stainless steel peg for you:
304 medium grade - the current grade you are looking at: OK to leave on the line if you live no where near salt! If you have salty breeze, do not leave them on the line as they will be constantly hit by salty air. They may be ok outside if left in a bucket with holes in the bottom - that way the rain will wash the pegs, and, being inside the bucket they are sheltered from gathering salt from the wind. Alternatively, bring the pegs inside.
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Features:
Materials:
100% "Salty" or 304-Grade Stainless Steel Wire of 1.8mm diameter. 5.8cm long.
Designed in Australia and made in China.