high impact thermoplastic in various sizes for most applications available in a range of drum sizes from 235mm diameter to 380mm diameter. all are fitted with a rotary friction brake for safe cable stowage and transportat......high impact thermoplastic in various sizes for most applications available in a range of drum sizes from 235mm diameter to 380mm diameter. all are fitted with a rotary friction brake for safe cable stowage and transportation. all reels with the exception of the sp240 and sp300 have a removable faceplate for mounting sockets etc. some versions are available with a slipring assembly to enable the user to pay the cable out without the need to disconnect from the power source. external flanges are also available where a panel-mounted socket is not required, but a lead and mobile socket or plug is required.