UPC 192126893014

• 13kg custom fitted upgrade spring.
• Suitable for Nerf Rival Phantom Corps Kronos XVIII-500
• MATERIAL - Made of steel with antioxidant layer, will less attenuation, powerful and durable to use.
• BRING BETTER EXPERIENCE - Brings a significant improvement on range and initial velocity.
• Suitable for the 14 years old and up.

Please feel free to contact us for the installation instructions if in need.The package contains a 10kg spring and 6 O-rings (O-rings are available in 3 different materials, two for each material, to give the player more selectivity). Springs need to be used with O-rings, otherwise the lift of the range is not obvious.Specifications:.Material: Steel + Silicone + Fluorine Rubber + Rubber.Product Size: 12.2*2.1*2.1cm.Product Weight: 60g.Package Dimensions: 13*3*3cm.Package Weight: 80g.Packing: BagPackage Content:.1 x Upgrade Spring.2 x Red O Ring(High temperature resistance, low temperature resistance).2 x Green O Ring(High temperature resistance, wear-resistant, high pressure resistance, acid and alkali resistance, high hardness, anti-aging).2 x Black O Ring(Oil-resistant, wear-resistant, anti-aging)