Clips are .023" thick Stainless Steel.
*** Keep in mind that the thickness of the clip is intentionally made thinner - and therefore softer to bend. It is better for the clip to bend when removed (if a bullet gets stuck) than to jam the entire package. With a thinner clip, it is also impossible to have a problem with the drum closing. All this means that it is likely that when using them there will be a certain percentage of clips that you will throw away.
If this does not suit you, please skip this sale. I'd rather make a small profit than unhappy customers. Thank you for your understanding!