Made of Marine Grade 316 Stainless Steel, tough and resistant to corrosion Designed for freshwater and saltwater use. Universal fit, suitable for both internal and exterior use such as boat, yacht.Multiple applications, such as marine boat, trucks, van, , trailers. High mirror face for sleek appearance and to match today's modern watercraft. Nylon lined to prevent rattling while Oarlock in use Easy to install, durable and corrosion resistant. production shipment tested and certified. Weight: 115 grams size:100 x 19 x 36mm Material:316 stainless steel colour:Silver Package Contents: 1 x side propeller 4 x screw Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.