DESCRIPTION: Delavan created its nozzle using bi-metal construction. The Brass body and stainless steel metering parts permit machining to close tolerances for precision and consistently high performance. Brass transmits heat fast from the nozzle face to reduce the possibility of varnish and oil residue buildup. Stainless steel provides that extra durability for metering parts where wear is a factor. HOLLOW-CONE Type A-nozzles are mainly used on burners with a hollow cone air pattern and for through puts up to 2.00 GPH. The droplet distribution is concentrated on the outside of the cone and results in good ignition and low-noise combustion. Feedback: We appreciate you leave 5 star positive feedback for us upon receipt of your item, if your item hasn't arrived or isn't as described and want to leave a negative feedback please contact us first to give us a chance to make things right for you, and we will do our best to assist you solve the issue. Warranty Returns & Refunds:We have 100% satisfactory guarantee, if you are not satisfied with your purchase, or If by any chance you do receive a defective item please contact us and we will help to resolve your problem.Please contact us within 14 days of receipt to return it for refund or exchange. Non-defectikive item returns will be accepted within 14-days.There will be NO restocking fees. Buyer is responsible for return shipping costs. Shipping:All orders will be shipped within 1 business day after the payment is cleared.We use USPS First Class Service: all shipment will be with tracking number. WE APPRECIATE YOU SHOPPING WITH US AND LOOK FORWARD TO KEEPING YOU AS A HAPPY CUSTOMER, HAVE A NICE DAY!!!!!!