Guardian Angel Safety Window Guard, Escape Guard for Any Window Type Removable Guardian Angel GA1417-44 window guard childproofs horizontal or vertical window openings. 4 steel bars. Extends 14 to 17 inches. Stack horizontally or vertically if more coverage required. Window bar height is 21 3/8 inches. Bar spacing of 3 7/8 inches exceeds 4 to 5 inch safety standards. Bars lock into side bars that extend 2 inches above and below top and bottom bars. Mount side bars no more than 2 inches above window sill. Depress 2 lock buttons on one side, compress guard, then push other 2 buttons to remove guard. Durable lead-free white paint powder coated onto strong steel tubing.Tested to withstand up to 150 pounds of pressure in locked position. Made in USA. Use a window stop to limit opening to no more than 4 inches above the guard. Side posts anchor with 2 inch sheet metal screws into solid stud or frame mats. Combine with 3, 4 and/or 5 bar 1417 guards to fill openings. 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. Lifetime guarantee by manufacturer. How to measure for child safety window guards Identify window type VERTICAL The window opens by sliding a panel to the side in a track, cranking a panel out or pulling or pushing a panel of glass in or out. Guards for vertical windows are mounted like prison bars to protect either the entire window opening or the entire window. SINGLE HUNG The lower window panel moves up and down in a track. DOUBLE HUNG Both the upper and the lower window panels move up and down, each in its own track. For single or double hung windows, customers usually protect only the window opening. This is done with a single guard with a window stop to keep the window from opening above the top of t This item ships from a separate warehouse and may require extra time for delivery.