Features: Total Size: 27 x 11.8mm / 1.06″ x 0.46″ (L*D) Card Slot Size :2.1 x 7.55mm / 0.08″ x 0.3″ (L*D) Inner Dia: 5mm / 0.2inch Package Content: 20 Pcs x Cord Protector Relief Boot Description: 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.