This Collapsable Pocket monocular telescope is made of high quality brass sheet and solid brass. Each component is crafted with finest craftsmanship. Its small size makes it a very convenient item that can be stored right in your pocket. This is a great item to use while sailing or to add to any nautical collection. The item dimensions are: L: 4 inches, W: 2.5 inches, H: 2 inches. Magnifying power is approximately 8x.