The back plates of these products are made of stainless steel which are good for all seasons.
This listing includes 12 sets of BM-3MAG-1 badge magnets, which is one of the most popular designs. It uses 3 instead of 2 dot magnets, so it holds better than the 2 magnet version. In this design, the magnets are encased in the navy blue plastics, which gives this badge magnet a better looking and feel than the all metal design. The following is the dimensions of the item,
Length = 1 3/4"; Width = 1/2"; Thickness = 5/32" ( Does not include the back plate )
CMS BM-3Mag-1 badge magnets are the high end products of the kind. The magnets we choose are made of high quality neodymium magnetic material and triple layer coated. The back plate is made of stainless steel instead of the regular iron so it will never rust in the wet environment. We choose 3M brand as the peel-and-stick adhesive and added a small tab so it's much easier to remove the liner and stick it onto your badges.