... of silicon core pipes or bare pipes:40/33,50/42,48/40,32/26. 1. HDPE duct for optical ... fiber cable. 2. 2000M/Roll. 3. 50/42, 40/33, 32/26mm ... .5. Aging-resistant, anticorrosion of chemicals. With long service life, and will not deteriorate within 50 years in ... ability, and its suitable temperature scope is from -40 to 100.7. Convenient in construction. This will ...