Click to expand Tap to zoom 40A12H-SB Type A Plate Sprocket 12 Teeth for #40 Roller Chain Sale $9.50 SKU 40A12H-SB Quantity One - $9.50 Price Each for 2 to 4 - $8.20 Price Each For 5 or more - $7.30 title Quantity One Price Each for 2 to 4 Price Each For 5 or more 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart 40A12H - SB (1/2") Bore Heat Treated Type A PLATE Sprocket for #40 Roller Chain 12 tooth Outside Diameter = 2.17" Pitch Diameter = 1.932 Free shipping in the USA!