either side of the second wing 28 b as described further below the spacers 62 facilitate the positioning of the window 16 within the window frame 18 the location of the spacers 62 also serve to reduce fractures at the support 46 to base 24 interface the retention clip 10 is a single unitary part made from a suitable engineering grade polymer such as lubriloy u2122 manufactured by general electric plastics while other materials may of course be employed for manufacturing the clip 10 some of the advantages of the present invention may not be realized when such other materials are used further while the clip 10 is preferably manufactured using a suitable plastic injection molding process it must be realized that other manufacturing techniques may be employed although again some of the advantages of the present may not be realized when such manufacturing techniques are used the operation of the retention clip 10 will now be described in detail at least one clip 10 is secured to the window 16 at a periphery of the window 16 preferably as seen in fig1 and 2 each of four clips 10 are secured adjacent to a respective corner of the window 16 the clip 10 is secured to the window 16 using a suitable adhesive 64 applied to the open recess 44 such as ashland 39 s pliogrip u00ae two part polyurethane adhesive system while other materials may of course be employed in place of pliogrip u00ae some of the advantages of the present invention may not be realized when such other materials are used.