Study the above photos, no 2 is 10 oz and no 4 photo is steel and weighs 24 oz

Light weight space age metal is worth it, built tough to last too. The item in the photo one is what will be shipped.  Please note the grind marks on the outside teeth.

 Freeline marked. Managing customer expectations is the most difficult thing to do with photos and text.  This is a 428 chain 25tooth 40 mm split gear.

 Please examine this product closely to insure it is something that you can use. It is better to ask questions in advance than after the purchase.