Main Color: BlackMaterial: pc+pp+;Size: 22 x 22mm/0.8" x 0.8"(L*W)Inner Dia: 18.3mm/0.7"Net Weight: 30g18650 cylindrical battery holder, fire retardant pc+pp+ materialsCrack resistant edge with the slot, with the , It can accomodate sizeBattery installation hole diameter 18.3mm, 1-linked structure, 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.Package Contents:20 x Battery Holder BracketsOnly the above package content, other are not included.Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.