Nicely Neat Watering Spikes for Plants, Automatic Adjustable Flow Rate, Water Bottle & Soda Bottle Compatible, Set of 6 Drip watering; adjustable flow rate from fast to slow drip watering; use more watering spikes depending on plant size and type Compatibility; ompatible with most water and soda bottles (up to 1 liter) Size; total size is 11 x 2.4 inches (28 x 6 centimeters); the length of the spike alone is 8.7 inches (22 centimeters); the extra-long spike allows for the stable placement into the soil Complete set; this is a set of 6 watering spikes 30-day return policy; here, at Nicely Neat, we want you to be satisfied with your purchase; you are backed by our 30-day no questions asked money back return policy so you can buy with confidence