Features1Fork Oil Absorbing Sponge:Absorbs grease within the fork to keep the inner tube cleaner. 2Fork Plastic Bushings:Prevents leakage of lubricating grease from lubricated parts and also prevents external moisture, dust, or other contaminants from entering the internal mechanism. 3Teflon Rings:Serve as a barrier between the fork legs and the inner tube to prevent direct friction. Made of Teflon material, they provide a smoother surface, reducing friction, noise, and increasing the durability of the inner tube. 4Plastic Bushings:Act as a separator between the fork legs and the inner tube to prevent direct friction. 5Oil Seals:Prevent lubricating grease from leaking out of the parts that require lubrication and also prevent external moisture, dust, or other contaminants from entering the mechanism.Specification2 High-density foam with silicone O-ringMaterial: High-density foam, O-ring material: SiliconeSize: 32mm/34mm (diameter) OptionalWeight: 13g / 0.46ozPackage List:2x High-density foam ring for fork inner tube1x silicone O-ring10 High-density foamMaterial: High-density foamSize: 32mm/34mm (diameter) OptionalWeight: 16gPackage List:10x High-density foam ring for fork inner tubeMetal BushingsMaterial: Iron FluorideSize:32mm Bushings -Outer Diameter 3.6cm / 1.4in, Inner Diameter 3.3cm / 1.3in, Height 1.5cm / 0.6in;34mm Bushings -Outer Diameter 3.7cm / 1.5in, Inner Diameter 3.4cm / 1.3in, Height 1.5cm / 0.6inWeight:32mm Bushings 86g / 3.0oz for set of 4,34mm Bushings 94g / 3.3oz for set of 4Package List:4x Iron Fluoride Bushings for Mountain Bike ForksPlastic BushingsMaterial: PlasticSize for 32mm Inner Tube: 11.5 x 3.6 x 3.6cm / 4.5 x 1.4 x 1.4inSize for 34mm Inner Tube: 13.5 x 13.7 x 3.7cm / 5.3 x 5.4 x 1.5inWeight for 32mm Inner Tube: 21g / 0.7ozWeight for 34mm Inner Tube: 35g / 1.2ozPackage List:2x Plastic Bushings for Inner TubeSealing ring X ring + O ring + 2 oil sealsSize for 32mm Inner Tube: Outer Diameter 4.3cm / 1.7in, Inner Diameter 3.2cm / 1.3in, Height 1.2cm / 0.5inSize for 34mm Inner Tube: Outer Diameter 4.5cm / 1.8in, Inner Diameter 3.4cm / 1.3in, Height 1.4cm / 0.6inWeight: 24gPackage List:1x Sealing ring X ring + O ring + 2 oil sealsPackage List1x Sealing ring X ring + O ring + 2 oil seals