Child Safety Begins with Window Guards to Protect Children from Deadly Falls Guardian Angel GA-2335-43 window guards. Four pack. Use individually or stack vertically or horizontally. Guardian Angel window guards expand easily and lock into mounting bars. Egress escape window guards are for safety not for home security . Each expands to fit a window 23 to 35 inches high or wide and protects 13 inches to 17.25 inches wide or high . Guardian Angel II window guards are made from strong, steel tubing powder coated with a durable, lead-free white paint. Guardian Angel Window Guard 2335-43 Four Pack Features Low-profile appearance. Tested to withstand up to 150 pounds of pressure in locked position. Number of Bars Per Unit 3 Expansion Per Unit 23-35 inches Protection Area 13 to 17.25 inches high or wide Per Unit Quick release buttons for fast window guard removal in emergencies. 4 emergency release buttons, two on the right and two on the left. Push in two buttons on the same side.Collapse the window guard. Push in remaining two buttons to remove guard. No tools or excessive force needed for removal. Remove window guards from inside or outside the window. Bar spacing of 3 7/8 exceeds 4 to 5 safety standards. Side posts anchor with 2 sheet metal screws into solid stud or frame mats. Combinations of 3, 4 or 5 bar units protect openings of vertical windows like sliders and casements or mount horizontally to fill part or all of single or double hung windows that go up and down. Conforms to American Society for Testing and Material standards ASTM F2090-01A and recognized by the U.S. Consumer Products and Safety Commission. Conforms to most local fire and building codes for egress type window guards. Meets Massachusetts building codes 780CMR 3603.14.2.2 and 780 CMR 1010.4. Made in USA. Lifetime guarantee by manufacturer. For large quantity orders, allow three weeks for delivery. Express shipping available depending upon inventory. How to mea This item ships from a separate warehouse and may require extra time for delivery.