Features：Low insert loss; Good repeatability; Good changeability; Good temperature stabilization.

Mechanism Features: insert and pull frequency > 1000; Changeability(db) ≤ 0.20；Tensile strength < 0.1; Ascillating  test < 0.1.

Condition Features: High temperature < 0.2; Low temperature < 0.2.

Use: Applied in optical fiber communications system, fiber optic data transmission, LAN, optical fiver sensors and optical CATV.