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Title: Hazardous material!
Review: I was excited to get these. I fly RC models and O-rings come in handy quite often for prop savers and the like, but every time I break and o-ring it seems I don't have the right size spare. The local hobby shop will kindly sell me a replacement for about $1/ring.But when I got the box there's a big warning on it that this product contains chemicals known to cause cancer including lead.Maybe all o-rings are like this, but I've never seen this before. I definitely don't want to be handling anything with lead with two small kids in the house. I will be returning them.
