Take the quesswork out of caster stem selection. Each set is packaged with 5 casters wheels and 10 stem fasteners; 5 each 7/16" dia. x 7/8" long and 5 each 3/8" dia. x 1" long. Use the appropriate stems and toss the other out. Designed for metal base furniture. Choose hard wheels for carpeting or soft wheels for use on hard floors and chair mats. Weight rated @ 100 lbs per caster. Color: Matte Black.