Out-of-Stock 160mm diameter Phonic Trap sheath 160mm diameter by 3 or 6m Pre-cut - Phonic Trap GAINE-PHONIC-TRAP-160MM €34.50 Phonic Trape 160 mm diameter pre-cut ducting is available in 2 lengths, 3 or 6 m. It is specially designed to reduce the noise level of your ventilation equipment. Noise reduction of 50% compared with conventional ducting. Made in France. View