Nitrile O-Ring commonly found in losi 1/5th Diff cups.
2.5mm Cross Section
Made from Nitrile 70
For Reff use : To fit a drive shaft of 10mm OD, &/or hole size of ~14.5mm
Your S & R Text. Could be a copy of what is in shipping.php, a precis of it, a link to it, etc. Whatever you decide you need...