Features： 1、Fork Oil Absorbing Sponge:Absorbs grease within the fork to keep the inner tube cleaner. 2、Fork Plastic Bushings:Prevents leakage of lubricating grease from lubricated parts and also prevents external moisture, dust, or other contaminants from entering the internal mechanism. 3、Teflon 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. 4、Plastic Bushings:Act as a separator between the fork legs and the inner tube to prevent direct friction. 5、Oil 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. Specification： 2 High-density foam with silicone O-ring Material: High-density foam, O-ring material: Silicone Size: 32mm/34mm (diameter) Optional Weight: 13g / 0.46oz Package List: 2x High-density foam ring for fork inner tube 1x silicone O-ring 10 High-density foam Material: High-density foam Size: 32mm/34mm (diameter) Optional Weight: 16g Package List: 10x High-density foam ring for fork inner tube Metal Bushings Material: Iron Fluoride Size:  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 / 0.6in Weight:  32mm Bushings 86g / 3.0oz for set of 4,  34mm Bushings 94g / 3.3oz for set of 4 Package List: 4x  Iron Fluoride Bushings for Mountain Bike Forks Plastic Bushings Material: Plastic Size for 32mm Inner Tube: 11.5 x 3.6 x 3.6cm / 4.5 x 1.4 x 1.4in Size for 34mm Inner Tube: 13.5 x 13.7 x 3.7cm / 5.3 x 5.4 x 1.5in Weight for 32mm Inner Tube:  21g / 0.7oz  Weight for 34mm Inner Tube: 35g / 1.2oz Package List: 2x Plastic Bushings for  Inner Tube Sealing ring X ring + O ring + 2 oil seals Size for 32mm Inner Tube: Outer Diameter 4.3cm / 1.7in, Inner Diameter 3.2cm / 1.3in, Height 1.2cm / 0.5in Size for 34mm Inner Tube: Outer Diameter 4.5cm / 1.8in, Inner Diameter 3.4cm / 1.3in, Height 1.4cm / 0.6in Weight: 24g Package List: 1x Sealing ring X ring + O ring + 2 oil seals Package List： 10x High-density foam ring for fork inner tube