This durable fiber holder, specifically designed for 900um fibers, is an essential accessory for AFL's FSM-11R, FSM-11S, FSM-50R, and FSM-70R fusion splicers. By securely holding a single fiber in place during the splicing process, it ensures precision and reliability, making it a valuable tool for professionals in the fiber optic industry. Sold in pairs, this component plays a crucial role in enhancing the overall efficiency of splicing operations, allowing technicians to achieve optimal results with ease.