Flex-X Phone MountRAM Mounts innovative X Grip holder for cell phones and other small electronics pairs up nicely with our 4. 5 SeaSucker. You can mount it just about anywhere, and the bendable arm gives you all the positional flexibility you could ask for. This is our favorite mount for cell phones. Choose from two sizes: standard holds items up to 3. 25", XL holds items up to 4. 5" (your Max, Ultra, and XL phones, and phones in fat cases).