Features:Inner Dia: 7mm / 0.26inchOuter Dia: 11mm / 0.43inchTotal Size: 19 x 15mm / 0.75 x 0.59inch (L*D)Package Content: 20 Pcs x Cord Protector Relief BootDescription:Mainly use for cellphone charger, aviation plug, power tool, electric drill cable wire protection, ect.This wire boot is used to protect the wire from bending.