SDG Tellis Collar Assembly Replacement Parts Everyone knows that parts on your bike will need to be replaced with regular use. Parts like your chain, cassette, cogs, brake pads, and even the seals and bushings in your dropper post will need to be replaced. The SDG Tellis Collar Assembly comes with replacement parts for your SDG Tellis Dropper Post. It comes with a top collar, seal and bushing, and a keyway assembly. Features Designed for the SDG Tellis Dropper Post Includes a top collar, seal and bushing, and a keyway assembly Manufacturer's part number: 09492 | Sdg | Tellis Collar Assembly Seal, Collar, Bushing And Keyway Assembly