Description: Materials: marine grade 316 Stainless Steel Overall size: approx. 7 x 4.2cm/ 2.75 x 1.65 inch (Outer Dia. x Height). Inner diameter: approx. 6.8cm/ 2.68 inch Superior corrosion resistance and durability Install almost anywhere, table, counter top, dashboard, boat, truck, RV, etc. Package Includes: 1 Piece Stainless Steel Drink Cup Holder Note: Please allow 1-2mm difference due to manual measurement. Thank you