Made of stainless steel and the writing part is copper. Waterproof and Weatherproof, not easy to brittle or snap, suitable for long-term use. Each label has plenty of space for you to write on, and the sturdy two-foot design are easy to insert into the soil and relocate around the garden. Garden markers is waterproof and rainproof. And it is easy to clean. A durable identity label for fruit trees, flowers, shrubs, vegetables, herbs, seedlings and more.