Aluminum and plastic coffee tamper set, screw-on base, for 53mm diameter. Includes distributor and dosing ring, with extraction filter. - Material: Aluminum and plastic - Type: Coffee tamper set - Design: Flat base with textured grip - Base diameter: Approximately 53mm - Color: Black and silver Thank you for viewing. I purchased this for espresso from an online shop, but the size didn't fit my home machine, so I'm selling it. I opened the package, but it's unused, so it's almost new. There were some minor scratches from the time of opening due to being shipped from overseas. I would appreciate it if only those who understand this would purchase it.