Pick the Right Drywall Type for Your Project. Homeowners can choose between fire- and moisture-resistant drywall, and select drywall thickness. When purchasing drywall for a home improvement project, homeowners can choose between drywall thickness and its ability to resist moisture and mildew.
The numbers you have indicated (4x32) are for a 4-power magnification (4x) riflescope with a 32mm objective (front) lens. You cannot make the scope stronger.2 means the diameter of the scope tube. Wider tubes gather more light, but this is mostly important for bigger magnifications. 4x32 is a common setup for a 22 rifle scope 3-9x40 is a common deer hunting scope.
The Barlow Lens is an eyepiece. You put it in the telescope in order to look through the telescope and actually see something. It changes the magnification of the telescope. It may be labeled 2x or 3x to indicate the magnification change.