Specification Brand : Floyutin BulletPoint1 : Measurement (Appr.): 304 Stainless Metric standard M20 Double Pulley. M20 stands for Metric wheel diameter(19mm/0.75"), Width of pulley groove 7.5mm/0.30".the swivel ring inner diameter 14mm/0.55", thick 4.5mm/0.18".Plate thick 4.5mm/0.18".Total Length 71mm/2.8".Weight: 3.4oz/95g. BulletPoint2 : Double Pulley Wheels.Used these to build a block and tackle for hanging items.3/8 inch rope fit for M20, or use clothesline or similar diameter wire cabel. U shaped casing for wheels can keep the rope don't to slip off and blind at the axle.The point of double pulleys is to reduce the pulling force. NOTE:Lifting small projects or use as single pulley applications. (Max load bearing 35KG) BulletPoint3 : Easy installation, Worked with rope or paro cord(Note the pulley groove width).1 pulley top and 1 pulley bottom,installed this as the anchor and pulley.Can used in conjunction with an eye bolt and carabineer. BulletPoint4 : Multi-purpose Application: Cable pulley system for lifting,traction,crossing.Widely used in indoor and outdoor light loads applicationin,such as in rope lifting, tent tightening, industrial lifting and many other field. BulletPoint5 : 2 pcs Double Pulley Wheels included,with swivel hanging eye ring on the top. Made of 304 stainless steel, good smooth soliding,, no sharp edges,rust resistant,sturdy and durable, High quality hardware. Color : Silver ExternallyAssignedProductIdentifier : 7022051224269 ExternallyAssignedProductIdentifier1 : 0616943875737 ExternallyAssignedProductIdentifier2 : 616943875737 IncludedComponents : pulley system rope Screw ItemName : Floyutin 2 Packs Stainless M20 Double Pulley Block Lifting Teaction Wheel Wire Rope Crane for Lifting and Hanging ItemPackageDimensions_Height : 14.605 centimeters ItemPackageDimensions_Length : 2.6924 centimeters ItemPackageDimensions_Width : 8.3058 centimeters ItemPackageQuantity : 1 ItemShape : square ItemTypeKeyword : snatch-blocks Manufacturer : Floyutin Material : stainless_steel_304 ModelNumber : FP2E002 NumberOfBoxes : 2 NumberOfItems : 2 PartNumber : FP2E002 ProductDescription : Floyutin Stainless Single Pulley Blocks Metric Wire Rope Crane 【Product Features】 Type: Pulley Block Material: 304 Stainless steel Metric Size: M15/M20