The HellermannTyton 634-03210 H321 is a Strain Protection Grommet (Bend Protection Grommet) that has been manufactured from flexible PVC and non-migrating Helvin. It has excellent insulating properties and is resistant to chemicals. Bend protection grommets are typically used for protection of cables at apertures in casings. * Halogen-free: Yes * Material: Polyamide 6.6 (PA66) * Max. cable tie width: 4.6mm * Inside diameter: 5.5mm * Mounting hole diameter: 6mm * Outside diameter: 8.5mm * Supplied in Black * Supplied Singularly * Type: HV Series * Manufacturer's part: Hellemann Tyton 632-03210 H321