1.5 inch (38mm) telescoping Carbon Fiber poles for boat shade: Available in five colors, black, white, silver, red and blue (with clamp to adjust the height of the poles). Comes with internal rigging and high grade sailing block. Fits all regular rod holders. For boats under 30 feet, or shade areas less than 50 square feet. Mostly used on aft shade installations (we have a separate bow pole for bow shade installations).