Universal Parts Inner Valve Spring $2.99 Quantity discounts available QuantityPrice SKU: 151-109 This item is IN STOCKCurrent Stock: 73 Quantity -+ Add to Cart Details Specs Inner Diameter: 12.3mm Outer Diameter: 16mm Height: 30.5mm Supported Models QMB139 50cc/49cc , Various unlisted makes/models DetailsSpecsSupported Models Back Universal Parts Inner Valve Spring for 50cc 4-stroke QMB139 engines. Back Inner Diameter: 12.3mmOuter Diameter: 16mmHeight: 30.5mm Back QMB139 50cc/49cc , Various unlisted makes/models