Interfit SGM700 Flex Mount Description. Interfit Flex Mount for Strobies kits & accessories. BFitting a Flex Mount could not be simpler. BThe flex Mount is correctly fitted when the the flash gun cannot be pushed any further inside the flex mount & is flush with the central hole of the Flex Mount. Colour gels may be fitted inside the Flex Mount including manufactures white balance filters. You do not need to use any glue rubber bands or velcro when using a Strobies Flex Mount. In the image on the right you can clearly see the front mounting clips for use with Strobies products these allow you to change from a Beauty Dish to a Snoot in seconds. BFlex Mount Softbox Mounting holes BOn each edge of the Flex mount you will see 4 holes for mounting a Strobies softboxas shown with the rods inserted. It is best to erect the softbox without the flex mount being on the flashgun to prevent any damage to the Flash gun or the material of the softbox.