I have kept this item unused. I purchased it from a shop that handles imported rod building supplies. The manufacturer is unknown. The color is black, the total length is 92mm, the weight is 28.0g, the seat outer diameter is 16.7mm, the seat hole inner diameter is 13.5mm, and the diameter of the upper end of the reel seat that is embedded in the grip is 21mm. Because of the large inner diameter, it is also suitable for making glass rods with thick butt sections. There are slight scratches due to storage, but please understand. This is a relatively durable product made of aluminum, so I will put it in a cushioned envelope and send it via Nekopos.