?Comes with 2x 1inch ball mount,1x Tripod mount adapter,4pcs of M4*16 bolts,4pcs M5*16 bolts,4pcs of M5*20 bolts. ?Housing carrier helps the tray secure more tightly and you can either use it as a handle without extra ball or use it as with extra ball to connect more lights. ?Tested and suiteable for nauticam rx100 ,A7RIII IV ,5d mark IV , and A1 Most of the nauticam housing And Nitescuba NS10 tray. ?Extra 2 ball mount and tripod mount adapter for Gopro, Allow we set up more dive light and strobe light or other accessories include action camera. ?Full Aluminum material and hard anodizing,Nitescuba NS10-H houing carrier suitable for all nauticam housing include DSLR and compact housing.