Water Tube Diameter is 3/8" Made of bonze with a lovely Verdi patina finish. This dramatic dolphin will be the focal point of your patio, pool or garden setting. It captures the playfulness of the real Dolphin. This fountain will be enjoyed for many years by all ages. Don't forget your pump to complete your wonderful new addition to your landscape. Pump is not included.You can order the BBPK450pump kit.