[Size] Specifically designed for 7x3.5mm ceramic cores and 9x7.8mm connectors—ensures a perfect fit for fiber optic fault-finding equipment maintenance. [Indicator for Replacement] When the fiber optic locator detects no light at the opposite end, indicating core wear, these ceramic cores and metal pen heads facilitate easy and timely replacements. [Durable Build] Crafted with metal heads and ceramic cores, ensuring durability and reliability for prolonged use, ideal for critical fiber optic repair and maintenance tasks. [Easy Installation] Simply open the dust cover, insert the ceramic core into the red light pen, and securely tighten the plug with appropriate force for hassle-free replacements. [Comprehensive Repair Kit] Includes 10 each of 7mm c.
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