Specification Brand : Groz-Beckert BulletPoint : Klasse Serger (170K) 80/12, 4 Needles BulletPoint1 : Box of 50 Groz-Beckert 7X23 Industrial Sewing Machine Needles. BulletPoint2 : Needle system: 7X23. Also sold under needle system number : DYX23 BulletPoint3 : Needle needle butt to eye : 52.8mm BulletPoint4 : Shank Diameter : 2.5mm Color : Chrome CompatibleDevices : Domestic Sewing Machine CompatibleMaterial1 : Cotton CompatibleMaterial10 : Leather CompatibleMaterial11 : Suede CompatibleMaterial2 : Polyester CompatibleMaterial3 : Wool CompatibleMaterial4 : Silk CompatibleMaterial5 : Rayon CompatibleMaterial6 : Acrylic CompatibleMaterial7 : Linen CompatibleMaterial8 : Nylon CompatibleMaterial9 : Faux Leather ExternallyAssignedProductIdentifier1 : 0610683804354 ExternallyAssignedProductIdentifier2 : 610683804354 ItemName : 50 Groz-Beckert 7X23 DYX23 Industrial Sewing Machine Needles-Size 25 ItemPackageDimensions_Height : 2.4 inches ItemPackageDimensions_Length : 0.24 inches ItemPackageDimensions_Width : 3.5 inches ItemPackageQuantity : 1 ItemTypeKeyword : sewing-machine-needles Manufacturer : GROZ-BECKERT ModelName : GB-7X23-50-25 ModelNumber : HLx5-18R-50 NumberOfItems : 5 PartNumber : GB-7X23-50-25 ProductDescription : Box of 50 Groz-Beckert 7X23 Industrial Sewing Machine Needles. Needle system: 7X23 Also sold under needle system number : DYX23 Needle needle butt to eye : 52.8mm Shank Diameter : 2.5mm A needle system is a group of needles made to fit specific sewing machines. All needles in a system are of the same length and shank size, but are of various diameters. Lower size numbers are narrower or thinner needles used for lighter materials. Higher size numbers indicate a needle of thicker diameter, used for heavier materials. Match your needle system to your machine, then the size of the needle to the product you are sewing. Groz-Beckert 7X23 needles are available in following sizes. Please select the size from the drop-down option menu : Singer Size 22 (Metric Size 140) Singer Size 23 (Metric Size 160) Singer Size 24 (Metric Size 180) Singer Size 25 (Metric Size 200) Singer Size 26 (Metric Size 230) Singer Size 27 (Metric Size 250) System 7X23 is a long, stout needle generally used in machines for especially heavy-duty sewing. ProductSiteLaunchDate : 2023-03-11T04:41:36.241Z Size : Size 25 Style : Durability SupplierDeclaredDgHzRegulation : not_applicable UnitCount : 50 UnspscCode : 60120000 WarrantyDescription : Manufacturer warranty for 30 days from date of purchase