Back Arts & CraftsOrigin8AmazonOrigin8 Track Cog, 20t x 1/8R 1 729.005.0(6)rated at Amazon ยท checked 4 days ago View at Amazon AverageR 1 774.00Lowest seenR 1 729.00Highest seenR 1 774.00Last change-R 45.00First indexed26 Oct 2026RetailerAmazonPrice historyDescriptionThreaded, hardened chromoly design ULTRA strong design Coated to withstand rusting 1.37" x 24 tpi