iStir has been designed to make sure one stirrer is enought for your entire life.They have metal centre for the strength, so they never break and it’s very easy to remove dry resin. - ERGONOMIC DESIGN: The silicone material is comfortable and soft, the length is reasonable, comfortable to use, and it is not easy to fatigue.  - SAFETY SILICONE MATERIAL: These spatula are made of food grade silicone, good stability, no odor, high temperature resistance(-40℃-200℃) and durable for long time. size:24.5cm x 2.6cm