Buy on Amazon : br br FOTGA DP500IIS DSLR 15mm rod rail support cheese baseplate rig for follow focus Matte box in br br It is completely made of metal-still sturdy enough for holding follow focuscameramatte boxetcjust as FOTGA DP500II alway br Complete rail system is made of Metal Rails length 25cm Rails dia 15mm Rails center-to-center distance 60mm br Tripod mounting plate size 80mm x 38mm camera mount plate size 108mm x 42mm Screws thread 14 38