SP25/BL/10M PVC Coated Galvanised Steel Flexible Conduit. Two types of flexible liquid resistant conduits from Adaptaflex, the standard version is a helically wound galvanised steel strip with a black PVC cover whilst the LFH (Low Fire Hazard) type is Polyolefin covered which has halogen free, flame retardant & low toxicity properties which complement Fire Performance cables where public safety is of concern e.g. Hospitals, Shopping centres, Underground Railways etc.