Polypropylene, these corrosion free funnel holders can hold funnels with dia 3''-6''. Polypropylene, these corrosion free funnel holders can hold funnels with dia 3''-6''. The extra plate provided can be placed to hold funnels having dia 1''-3'' Two tapered wedges are provided to ensure firm grip on rods having dia 1/2''-3/8''.