This item is a component kit for use in the bipolar to MOSFET conversion of CB & 10 meter radios which equals the EKL/Palomar EN1230 companion part. This is the parts needed for the Cobra 25, Cobra 29, Uniden 66, Uniden 68, Uniden 76, Uniden 78 and many others when using the Palomar ERF2030+ MOSFET transistor. This kit will usually also work for use with the IRF520, IRF520N and FQP13N10 MOSFETs in most of those above radios. If you don't know what your doing with these parts please do not order them. Failure to know what your doing will likely result in undesirable performance or damage to your radio. When used properly these parts will usually result in very favorable increased performance of your radio when used along with a MOSFET. Assembly instructions are included with each kit. Once assembled it will be polarity sensitive just like the EN1230 companion part and you MUST install it in the correct direction depending on your radio! Do not use these with a factory bi-polar transistor such as a 2SC1969! Each kit also comes with a new mica TO-220 insulator and plastic bushing for the MOSFET mounting screw. You will need to supply new transistor heatsink compound for installation of your MOSFET. Be sure to remove old heatsink compound and clean the mounting area good. Apply new heat sink compound before installing your new MOSFET. We also sell all the above mentioned MOSFETs in our ebay store. To save YOU money on shipping move multiple items to your cart and request a total before you pay! YOU WILL ONLY PAY ONE SHIPPING CHARGE FOR ANY QUANTITY OF THIS ITEM! BUY MORE AND SAVE ON SHIPPING! ATTENTION: WE DO NOT CANCEL ORDERS ANY LONGER DUE TO THE FEES THAT EBAY CHARGES US ON THE TRANSACTION. PLEASE DO NOT ASK TO CANCEL AN ORDER. We combine shipping whenever possible. To receive a combined shipping discount for multiple item purchases, you MUST move items to your cart and then request a total BEFORE you pay. An invoice will be sent with the adjusted shipping charge for all items purchased and then you will pay for your purchases from that invoice. Due to the time and expense of doing small refunds, we can no longer issue shipping refunds so please request a total first if you want a combined shipping discount. If you are restricted from requesting a total by eBay (such as while using the smartphone eBay app), you should use a normal browser from your smartphone or else use a desktop/laptop computer to request a total from your cart. We strive to save you as much as possible on shipping. Please let us know if you are having difficulty placing an order and we will be glad to assist you. We only ship to the USA locations! No international shipping! If you are ordering from outside the continental 48 states, an additional shipping charge may be required for additional postage due to the distance you are from our shipping location. The US Postal Service has recently raised rates significantly yet again to all shipping zones and unfortunately we have had to raise our shipping rates to buyers. Sales Taxes: All sales taxes are now collected by eBay. If you owe sales taxes, they will be calculated at the time of payment and automatically by eBay. If you have any questions regarding this item, please ask before you purchase the item. No returns on opened, used or installed parts! Breaking, removing or tampering with warranty seals will void any stated guarantee or warranty or right to return item!