Description Single-Railblock-4 with 4pcs female 1/4"-20 thread and 1pcs male 3/8"-16 thread enables you to mount any 3/8"-16 accesssories on to 15mm rod. Material: aluminium alloy Please click here or visit following link to watch a video introduction. http://www.youtube.com/user/TheCOOLLCD#p/u/9/IeN-wJY-hU8
__04884.1513655245.jpg?c=2 "https://d3d71ba2asa5oz.cloudfront.net/12031759/images/smallrig-railblock-for-15mm-rods-with-14-threads-888%20(1).jpg")
__90348.1513655896.jpg?c=2 "https://d3d71ba2asa5oz.cloudfront.net/12031759/images/smallrig-15mm-clamp-1493%20(1).jpg")