About Bremer Mfg. Co., Inc. We have provided quality sand cast aluminum products for 70 years, with an emphasis on Service. We specialize in, but are not limited to, highly cored, complex, aluminum sand castings that are finished to specification. Our professional engineering staff can assist you in the conception and design of your finished product. Our weight range is in ounces to 20 lbs on our Hunters and up to 40 lbs on our airset line. Your casting can be completely machined, painted or plated and ready for assembly (or we can provide the assembly for you), on time and done right the first time.