The 64568089 is NEW generation with coding type plastic guide rails for reliable retention of PCBs or plug-in units. Significantly increased stability, due to a optimized design and high quality material (PC). Improved fire safety properties, fulfills EN 45545-2 requirement sets R22, R23 and R24 with HL3. Can be clipped into horizontal rails (Al extrusion) or into 1.5 mm thick plates. Can be bolted to the horizontal rails Type H and R for higher shock and vibration requirements.