CALF EZE™ CALF OB CHAINS Title 30" OB Chain - $ 5.87 45" OB Chain ***BACKORDER*** - $ 6.62 60" OB Chain - $ 7.76 $ 5.87 Qty: Add to Cart Neogen OB chain for use with Calf Eze™ Calf Puller. 3 available lengths.