Check the listing for details. Studer A80 (R, RC, VU) Extender Board Riser KIT FORM. Condition: New. Listed at 70.00 USD. Studer A80 (R, RC, VU) Extender Board Riser KIT FORM One 20X2 Length 10 inch (228.6 mm) Height 3.25 inch (76.8 mm) extender. Pitch .150 inch One 25X2 Length 4 inch (101.6 mm) Height 4.45 inch (113 mm) extender. Pitch .156 inch These boards, close in fit and form to the original Studer component, is used to extend the plug-in boards so they can be serviced and/or repaired IN KIT FORM**. I now know that the 10-inch board has key slots. The buyer can either remove the key in the female connector or cut the slots in the extender board using a hobby saw. Boards are traced, fitted and edge connectors mounted. Buyer/builder needs only to solder remaining edge connector terminals. **If a set ready to use is needed please let me know and I will make a set ready to use available here on ebay. TO ORDER MAKE OFFERS AND TO SEE OTHER ITEM OFFERED GO TO: https://www.ebay.com/str/sparko6079?_trksid=p2047675.l2563 NOTE: I can custom make almost any extender board. With basic information about the extender you need I can program the automated CNC machine I have to produce what you need. I do not charge extra for customizing a board or set of boards needed to service most radios and test equipment. With basic information from EBay buyers I produce a set to sell to them through EBay and then offer the same extenders to other buyers on EBay. If you have an idea for an extender board or extender board set you or others need please contact me so I can make up a design and offer it on EBay. Thanks and best regards John WA1ESO