First thing that I would do is download a free manual at
www.singerco.com under customer support, just put your model #7436 and save it to your computer. Your bobbin size is 15j, you can buy anyplace that sells sewing machine parts, ie.
www.sewingpartsonline.com, etc , or call Singer at 1-800-4singer and order from them direct. Your needles are just ordinary, it depends what you are trying to sew. Ebay has different vendors too. Good luck
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