Check the listing for details. Astrodymium 96mm Accessory Rail for RS-135 Astrodymium Ring System # RS-AR. Condition: New. Listed at 18.00 USD. Astrodymium 96mm Accessory Rail for RS-135 Astrodymium Ring System # RS-AR From the Manufacturer Product Details PLEASE NOTE: This product is only compatible with version 4.0 (or higher) of the Astrodymium Ring System (flipped thumbscrews).Easily attach accessories with vixen style dovetails to your Rokinon/Samyang 135mm lens using this 96mm long accessory rail. This product is 3D printed solid out of durable PETG plastic. All threaded points use stainless steel threads for a strong and corrosion resistant connection. Easily attach accessories with vixen style dovetails to your Rokinon/Samyang 135mm lens using this 96mm long accessory rail. This product is 3D printed solid out of durable PETG plastic. All threaded points use stainless steel threads for a strong and corrosion resistant connection. iN THE BOX1x 96mm long accessory rail2x M5x12mm button head screws2x M3 aluminum thumb screws