WidgetCo is one of the few places I could find these individually sized stoppers in small quantities. Most others only sell in bulk or in sets. EPDM Rubber is high quality and works perfectly for my application. Shipping was a bit slow but hey, the USPS is slammed right now so it's to be expected. Best of all, shipping was free which is almost unheard of for small orders like this. Reasonable prices, unique products and free shipping are what makes WidgetCo stand apart from others. Well done.