This BOSB18C battery adapter converts conventional B type square lithium batteries to arc C type batteries for tools. With BOSB18C, you can use the for 18V Li-ion battery BAT618 on for ALL 18V green home Lithium tools Colour: Black Material: Plastic Size: 10 x 7 x 38cm Package Contents: 1 x BOSB18C Adapter Converter Only the above package content, other products are not included. Note: Light 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. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-Minnanxin