Universal Parts Crankcase Oil Seal - 16.4x30x5 $2.99 Quantity discounts available QuantityPrice SKU: 151-21 Restock: Early June This item is IN STOCKCurrent Stock: 12 Quantity -+ Add to Cart Details Specs Inner Diameter: 16.4mm Outer Diameter: 30mm Thickness: 5mm Supported Models QMB139 50cc/49cc , Various unlisted makes/models DetailsSpecsSupported Models Back Universal Parts Right Crankcase Oil Seal size 16.4x30x5 for 50cc 4-stroke QMB139 engines. Back Inner Diameter: 16.4mmOuter Diameter: 30mmThickness: 5mm Back QMB139 50cc/49cc , Various unlisted makes/models