GVO Marine Electronics: We provide reliable, safe online shopping 24 hours a day, 7 days a week throughout the U.S. and the world. We are strongly committed to providing our customers with top quality merchandise and world class service. Model 79015 Special Order items are not maintained in our warehouses but are ordered from the vendor upon receipt of a sales order. These items may be brought into and shipped from one of our warehouses or drop shipped directly from the manufacture Fairing Block for GT30 Series Transducers Use our fairing block to position your GT30 series of thru-hull scanning transducers parallel to the water line for increased sonar accuracy. If the deadrise angle of your mounting location exceeds 5 degrees, you should use a fairing block to mount the device. Compatible Devices: Garmin GT30-TH Garmin GT30-THP Garmin GT34UHD-TH Garmin GT34UHD-THP GVO Marine Electronics: . Get the item you ordered or get your money back. Covers your purchase price and original shipping.