**Minimum amount and shipping fees for Sustee and Nawrap brands are calculated separately** Sustee Medium size is best for 4.1 - 7.1″ diameter pots. Sustee Aquameter (Moisture Sensor) conveniently changes color to notify that your plants need to be watered. This multi-award-winning design is maintenance-free and works with all types of plants. No batteries required. Product Details ・Materials: polycarbonate (main body), non-woven fabric that can be broken down by microorganisms. ・After about 6-9 months, Sustee insert will need to be replaced in order to work optimally. (Sold separately) ・White color indicates plant needs watering; blue indicates it has been watered. ・Collaborated with Tokyo University of Agriculture to improve the design and function of each stick. ・Made in the Japan, ships from USA ・Size Options: S (0.4 x 0.3 x 4.7″), best for 2.4 - 3.5″ diameter pots M (0.4 x 0.3 x 7.1″), best for 4.1 - 7.1″ diameter pots L (0.4 x 0.3 x 10″), best for 7.1 - 10.2″ diameter pots