12B21 Metric Roller Chain Sprocket | 12B21H

12B21 Metric Roller Chain Sprocket | 12B21H

Marsoni

M251S

$26.39

Get it in 3 business days with 1 day shipping. Friday, May 29

12B21 Metric Roller Chain Sprocket | 12B21HProduct Details : 12B21 Metric Roller Chain Sprocket 12B21H Part No: 12B21H Product Type: B (Stock Bore) Sprocket Type: Metric Sprocket Chain Strand Type: Single Bore: Stock Bore Chain Size: 12 No. Of Teeth: 21 Pitch: 19. 050mm Pitch Diameter: 127. 82mm Bore Stock: 20mm Bore Max.: 64mm Hub Diameter: 100mm Hub Length Thru Bore: 40mm Material(s): Carbon Steel Hardened Teeth: Yes Avg. Weight (lbs): 5 For any information about products, please contact us.

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I bought this product because it was one of the few 40:1/50:1 synthetic 2 cycle oils on Amazon. I have machines that take both, so it's a nice thing to have just 1 gas mix. Anyway, I'd say this product works. My leaf blower hasn't seized up or anything after hours of use, but this oil is noticeably more stinky than the last random, generic product I bought at the farm store. It's a kind of harsh pollution kind of smell. It's hard to describe. It doesn't put out a cloud of smoke. It's just stinky. Not the smell of what I'm familiar with the old, non-synthetic 2-cycle oils of the past. Anyway, I thought you should know. I gave this review an extra star for Made in USA.

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Reviewed in the United States on October 5, 2024

Verified Purchase

Sabrina

Los Angeles, US

★★★★★ 5

Reasonable price

Size: Single of 13 fl. oz, Number of Items: 1

Great product

WAS THIS REVIEW HELPFUL?YesReportShare

Reviewed in the United States on March 10, 2026