EXFO America Inc. GP-1004 Battery compartment door Available for the following current units: - FLS-300 - FLS-600 - FOT-300 - FOT-600 - FPM-300 - FPM-600 - PPM-350C - FIP-400-DAnd also available for the following obsolete units: - ELS-100 - ELS-500 - EOT-100 - EOT-500