What is the fine-grained topic of the following text: Diamond has developed the new robust and reliable push-pull connector HE-2000™ IP protection 67 (protection against dust and water for temporary immersion of 30 minutes) in a plugged-in condition so that connections can be established safely and quickly with excellent optical and mechanical properties, even in challenging applications. Only return the topic.
Development of Diamond's New Push-Pull Connector HE-2000™ with IP67 Protection