40pcs Cable Protection Wire Buckle set for secure strain relief and panel mounting Key benefits Prevents cable wear and cutting by securing wire at the panel entry point, reducing strain where cables meet connectors or housings. Durable insulation and toughness made from PA66 engineering plastic for long service life when used within the recommended operating temperature. Two sizes included to cover both flat and round cables, reducing the need to source multiple parts for different projects. Simple clamp and panelfit design allows the wire to be fixed first and then slid into the panel hole for a neat, stable installation. What is included 20 pieces model 6N4 strain relief sleeves 20 pieces model 4N4 strain relief sleeves Total quantity: 40 pieces Material and performance Material: PA66 engineering plastic Recommended maximum operating temperature: 75 degrees Celsius Properties: insulating, impact resistant, and resistant to aging under normal operating conditions Specifications and compatibility Model 4N4 Size: 1 cm x 1.3 cm (0.4 in x 0.5 in) Applicable flat wire: 23 x 7 mm Mounting hole required: 12.7 to 13.1 mm x 11.8 mm Model 6N4 Size: 1.5 cm x 1.6 cm (0.59 in x 0.63 in) Applicable round wire diameter: 4.5 to 5.5 mm Mounting hole required: 15.9 mm x 14 mm Practical use scenarios Electronics enclosures: secure power and signal cables where they pass through chassis panels to prevent fraying and relieve strain on solder joints and connectors. Home and office wiring: organize and protect cable entries on power strips, extension boxes, and multimedia cabinets. Small appliances and DIY projects: provide reliable cable anchoring for motors, sensors, and control panels where vibration or movement could loosen wiring. Installation notes Select the correct model for the cable profile: 4N4 for flat cables, 6N4 for round cables. Clamp the cable in the buckle and then push the assembly into the precut mounting hole for a secure fit. Ensure the panel hole dimensions match the listed mounting hole sizes for proper seating. This 40piece strain relief bushing set provides a practical, durable solution for protecting and securing cables in a variety of electrical and electronic applications.