BEK Bulb Holder.The BEK Bulb Holder accepts all screw-in miniature bulbs. Mounted on a yellow plastic tile with connections for 4mm plugs or for use with crocodile clips. Features the bulb circuit symbol on top.Packs of the following bulbs are available to purchase separately:PP00053706 - 1.5V 0.2APP00053708 - 2.5V 0.2APP00053709 - 3.5V 0.2APP00053711 - 4.5V 0.3APP00053710 - 6V 0.06APP00053714 - 6.5V 0.3APP00053715 - 12V 0.5A