... Adapter Manufacturer Carefiber offers Fiber Optic Adapters, in PC, UPC, APC, SM and MM Types, Low Insertion Loss, Zirconia Sleeve. 1. ... Features: Low insertion loss. PC, UPC or APC, SM or MM is available. Accurate mechanical dimensions. Zirconia or phosphor ... bronze sleeve. High Reliability and Stability. FC, LC, SC, ST, MU, MTRJ, E2000, DIN, D4, MPO, ...