Thomas & Betts PCLT-12B.50 Electrical Conduit. PMA PMAFIX® Flexible Conduit Fine Profile Medium Duty Wall Series: PCL NW12 Trade 0.47 in Inside Dia 0.62 in Outside Dia 50 m Length 30 mm Bend Radius Very High Flexibility -50 to 105 deg C Nylon 6/Polyamide Black. Additional Description: TB -PCLT-12B.50 CONDUIT MWALL FINE PA6 NW12 50M BLK. Catalog Description: Fine Profile Medium Wall Very Flexible Black Conduit (PCL) Material - Polyamide 6 Conduit Size NW - 12 50 Meters.