Check the listing for details. Deardorff V8 Extension Guides. Condition: New. Listed at 89.00 USD. Deardorff V8 Extension Guides Brand new, from the original Deardorff inventoryThis is the guide that keeps both the front and rear extensions flush with the cameraMade of hardened stainless steel, with the same dimensions and hole locations (originally made of nickel-plated brass)Sold as a pair Pro Tip: Each camera had its guide rail holes aligned manually when hand-assembled in the factory. Both sides are not the same, so it's wise to always mark the rails left and right, as well as note the front and rear, as they should all be put back together in the same order and side as they were installed originally. CatLABS is a Brick and Mortar, all-analog camera store in Boston MA. Call us or come visit us in person at 3514 Washington St., Jamaica Plain, MA 02130 (Mon-Fri 9-530 or any time, on our website)