Centrobulb Jr Insecticide Duster Professional quality duster is perfect for both pest control pros and homeowners Long lasting thick, pliable, supple rubber squeeze bulb For insecticide dusting applications like crack and crevice treatments and carpenter bee nests Not for granular insecticide-Use only dust Holds 4 oz of dry dust product. Works well with Drione Dust, Delta Dust, Tempo Dust, Timbor, Borid Dust and other pesticide dusts.