Specification AgeRangeDescription : Kid and Adult Brand : Dawitrly BulletPoint1 : Multiple Sizes: There are 170 diving O-ring suits, which are divided into 12 different sizes for scuba diving(15 pcs of each most-used size: 003/1/16”, 010/1/4”, 011/5/16”, 012/3/8”, 013/7/16”, 014/1/2”, 015/9/16”, 022/1”, 111/7/16”, 112/1/2”; 10 pcs of each size:116/3/4”, 214/1”). BulletPoint2 : Stainless Steel Pick Set: Our O rings kit with two stainless steel pick set, it is easy to install and remove sealing rings from diving gears. And it can also be used as a tool for selecting O-rings, which is convenient and difficult to make O rings fall off. BulletPoint3 : High Quality: Scuba O ring kit is made of 90 Durometer Nitrile (NBR) material, it is oil-resistant, wear-resistant and tear-resistant. It is durable and suitable for various high-pressure and low-pressure hoses, gas cylinders and regulator valve ports. BulletPoint4 : Convenient Storage: The O ring set equipped with a transparent plastic box, all O rings are placed in separated small grid-shape space, which is convenient to carry, select and collect. And 003 to 013 with a extra separate transparent polyethylene bag to place, it reduce the risk of loss or lack of rings. BulletPoint5 : Classified Guidance: The inside of the cover of the storage box is equipped with the model and quantity labels of O-rings, so that you can select the model you need more accurately. And these o rings applied to different diving equipment, such as regulators, tanks, and hoses and so on, ensuring a leak-proof seal for your diving gear to enhance safety underwater. BulletPoint6 : Adjustable Tank Brackets can be combined with Roll Control Systems Double Tank Adapters to stow double tank systems. BulletPoint7 : The Corsica is designed and made in Italy by Cressi, a brand pioneer in freediving, spearfishing and scuba diving equipment since 1946. BulletPoint8 : Sport type: Outdoor Lifestyle Color : Black CustomerPackageType : Standard Packaging Department : unisex-adult ExternallyAssignedProductIdentifier : 8022983098807 ExternallyAssignedProductIdentifier1 : 197988511137 ExternallyAssignedProductIdentifier2 : 0197988511137 ExternallyAssignedProductIdentifier3 : 00027556119185 FitType : Regular Flavor : - GpsrSafetyAttestation : 1 Hazmat : 9 ImportDesignation : Imported IncludedComponents : 1 x 0.5L Scuba Tank IncludedComponents1 : Set of 2. Adjustable Tank Brackets IncludedComponents2 : Instructions ItemDisplayDimensions_Length : 4 inches ItemName : Dawitrly Scuba O Ring Kit 170 Pcs, 90 Duro Scuba Diving Nitrile O Rings with 2 Stainless Steel O-Ring Pick Set for Accurate Selection, Removal and Replacement for Dive Hose Diving Tank Scuba Gear ItemPackageDimensions_Height : 17.1958 centimeters ItemPackageDimensions_Length : 2.8956 centimeters ItemPackageDimensions_Width : 9.8044 centimeters ItemPackageQuantity : 1 ItemShape : Horse Shoe ItemTypeKeyword : diving-tank-accessories Manufacturer : Dawitrly Material : Nitrile Rubber ModelName : Scuba Tank ModelNumber : C300PLUS MountingType : Wall Mount NumberOfBoxes : 1 NumberOfItems : 1 PackageLevel : unit PartNumber : 0.5L Portable Scuba Diving Tank Pattern : - ProductDescription : 170 Pieces o rings kit Package Size: About 17.2*9.7*2.2cm/6.77*3.82*0.87in Package Weight: About 100g/0.1kg/3.52ounces/0.22pounds