This white porcelain insulator is a M-2150 with no embossing but is known as a Kootenay. This is due to its usage on Kootenay power lines in B. C. Canada. It measures about 6" wide by about 5 3/4" high. The insulator has eves on either side to channel the rain away from the crossarm. This insulator is in very nice condition with no chips or cracks but does have some light surface soot. These Kootenay insulators are very well made and said to be of European origin. A very nice displaying white porcelain multipart insulator. Priced at; $125.00 plus USPS Ground shipping cost. Thanks.