18650 cylindrical battery holder, fire retardant materialsCrack resistant edge with the slot, with the firm, It can accomodate various sizeBattery installation hole diameter 18.3mm, 1-linked structureNickel plate vibration test can be conducted without attachment to any device.Suitable for all types of battery assembly including do it option.Please note, installation requires top and bottom piece to work.Model Number: holderType: Battery Storage Boxcolor:BlackMaterial:plasticPackage Contents:100 x Holder BracketsOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.