Dimensions: (Medium) - Intended for pot sizes of caliber 15-25cm - Ideal for small succulents The Aquameter is a leave-in soil moisture sensor pen that can be left in the soil for continuous monitoring, unlike other moisture meters that need to be taken out after each measure Set includes five refillable watering sticks (green) - Moisture meter for house plants that has refillable replacement core - Each stick will last for approximately 6-9 months This soil aqua meter has plant water indicator that changes color depending on soil type - White indicates plant needs watering; blue indicates it's been watered Colour:green Material:plastic Due to different batches, there may be differences in product appearance and printed text, which will not affect use Package Contents: 5 * Plant Soil Moisture Sensor Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.