Description: Heavy duty marine grade cast solid stainless steel, corrosion resistance, tough, strong and durable Screw type drain plug with an o-ring for positive sealing Retention system prevents plug from getting lost when removed Mounts in a 7/8" diameter hole High polished head side for mirror-like appearance and to match modern watercraft/boat/yacht Great for boat transoms, fish wells, ice chests and more Specification: Material: 316 stainless steel Flange Size (L x W): Approx. 7 x 4.2 cm/2.76" x 1.65" Screw Hole Diameter: Approx. 0.5 cm/0.2" Total Height: Approx. 4.1 cm/1.6" Hole Height: Approx. 2 cm/0.79" Hole Inner Diameter: Approx. 2.2 cm/7/8" Hole Outer Diameter: Approx. 3.1 cm/1.22" Color: Silver Package Includes: 1 Piece Boat Drain Plug Note: Please allow slightly difference due to manual measurement. Color may be slightly different since different monitor. Thanks!