Transition:1cm=10mm=0.39inch
*Dimension For Your Reference:
1X18650 Battery Holder:77X21X21mm
2X18650 Battery Holder:77X40X21mm
3X18650 Battery Holder:77X60X21mm
4X18650 Battery Holder:77X80X21mm
*Material:Plastic
*Color:Black
Package include:
1 x Battery Holder(Battery is not include)