HENKE-JECT ® syringes are latex free, and contain no rubber, silicone oil, styrene or DEHP. These syringes are the choice for any situation needing an inert, non-reactive syringe. Manufactured only from laboratory grade polypropylene and polyethylene. These unique plastic syringes are more chemically resistant than rubber-tipped syringes and have a positive safety stop to help prevent accidental spills. HENKE-JECT ® syringes are individually sterile strip packed.