General description This BOSB18C battery adapter converts conventional B type square lithium batteries to arc C type batteries, allowing you to use the 18V professional Li-ion battery BAT618 with all 18V lithium power tools. Technical specifications Colour: Black Material: Plastic Size: 10 x 7 x 3.8 cm Other information Package Contents: 1 x BOSB18C Note: Light and different displays may cause the color of the item in the picture to differ slightly from the actual product. The measurement allowed error is +/- 1-3 cm.