https://www.dekut.com/World_Business/slotted-weights-%7C%7C-slotted-weights/ Slotted weights are manufactured from high quality cast iron that meets ANSI/ASTM E617 hardness requirements and are free of cracks, pits and sharp edges. Contact to SWPI today for your business.Slotted weights are manufactured from high quality cast iron that meets ANSI/ASTM E617 hardness requirements and are free of cracks, pits and sharp edges. Contact to SWPI today for your business. Tue, 30 Sep 2014 09:08:50 UTC en