Specification Brand : MKSIWSA BulletPoint1 : Packing list: 3pcs 1mod 12x12x1000mm rack, 3pcs 1mod 17teeth / 20teeth gear BulletPoint2 : Width: 12mm; Thickness: 12mm; Length: 1000mm; Net Weight: 1.1KG BulletPoint3 : Materail: 45# steel; Shape: Rack; Location: External gear; Shape: straight teeth BulletPoint4 : Tooth surface hardness: not hardened, if you need hardened, it need add usd 4/meter. BulletPoint5 : This can be used in Grinding Machine, CNC Machine. Color : 17 Teeth ExternallyAssignedProductIdentifier : 9406094489195 ItemName : MKSIWSA Industry 3pcs 1 Mod 12x12x1000mm CNC Rack + 3pcs 1mod 17teeth / 20teeth Pinion CNC Rack (Hole Diameter : 6mm, Number of Teeth : 17 Teeth) ItemPackageQuantity : 1 ItemTypeKeyword : rack-and-pinion-gears Manufacturer : SUOFEILAIMU-US Material : Metal NumberOfItems : 1 PartNumber : SUOFEILAIMU-123 ProductDescription : Features: 45 steel quenched hardness and smoothness, attention this product is not quenched, "Modulus" is the ratio of two teeth adjacent to the same side of the teeth between the tooth profile and the pitch t of the pi π m (modulus) = t (pitch) / π (3.14) Tip diameter D = number of teeth Z +2 * modulus M Gear pitch = 4.71 * modulus M Gear depth =3.375 * modulus M ProductSiteLaunchDate : 2022-02-17T06:20:48.701Z Size : 6mm Style : Manual UnitCount : 1 UnspscCode : 52140000