Pond Boss® 1/2 in. ID flexible vinyl tubing connects your pond equipment to ensure the pond functions properly. The tubing is 20 feet long, durable, and safe for fish and plants. The black color blends in naturally with surroundings. Quality materials and accessories, like pond boss® 1/2 in. flexible vinyl tubing, are critical for the adequate development and dependability of a pond and its components. Flexible vinyl tubing. Blends in naturally with surroundings. Black color inhibits algae growth. Dimensions: 1/2 in. ID x 20 ft. Safe for fish and plants.