This sale is for a box of 10 vintage new old stock, never been used Circle F No. 189 porcelain electrical socket reducers which go from a mogul to a medium or Edison base. Made in USA. Again, you are purchasing 10 reducers. Please see pictures and ask questions if you have them. We describe our items as accurately as possible. We do not know everything, so look at the photos as well as reading description completely. I will ship internationally and will combine shipping on multiple purchases.