Hi All,
I find myself with several lifetimes supply of one size of O rings They are nominally 21mm ID and 1.46mm diam cross section. If anyone would like some then please send me a SAE and I'll post you some. I do not know what material they are made from but they are black and feel 'normal'
Email me at bobdotminchinatntlworlddotcom for my snail address
Bob