This is a sample of the variety of shapes and colors available in porcelain LRIs. The top row are all side tab types. The brown ones are nice, but not really ususual. The two pieces on the left on the middle shelf are similar to the side tab types, but they lack a tab. These were used in the brace which held the lightning rod on the rooftop. The next five are spool variations. The bottom shelf has varieties of single groove styles. Yeah, some have smaller cross grooves, but for now I've been calling all of these single grooves. You can view original, and see some of the embossings. Some are R.H. & Co, Miller Quality, Kretzer Brand, etc. For more porcelain LRIs, see Terry Drollinger's previous photos.