Mark II Clear Insulation Blowing Hose 4" x 50'4" x 50' Mark II Clear Insulation Blowing Hose The Mark II Clear Insulation Blowing Hose is designed for use with insulation blowing machines and professional insulation installation equipment. This durable hose helps move processed insulation material efficiently from the blowing machine to the installation point. The translucent ribbed hose walls allow installers to visually monitor material flow while the abrasion resistant crown improves