Click to expand Tap to zoom 25A20H-SB Type A Plate Sprocket for #25 Roller Chain 20 Tooth Sale $10.50 SKU 25A20H-SB 1 2 3 4 5 6 7 8 9 10+ Quantity Quantity Add to cart #25 A Plate Sprocket with Stock Bore Tooth #: 20 Stock Bore: 1/4" Outside Diameter: 1.729" Pitch Diameter: 1.598" Free shipping in the USA! (Picture not of exact product)