• Gear material is 45 steel, the bore is all positive tolerance 0 - positive 0.04. There may be a small number of burrs in stock, which is normal.
  
• Gear surface blackening treatment and high-frequency quenching treatment of two kinds, for the 45 steel raw material hardness. The surface hardness is about 40-45 degrees.
  
• 1 mould 10 teeth - 14 teeth because the effective tooth height of 12mm, the rest of the position looks at the teeth, but not rolled in place, so the two gears are not suitable for parallel bite!
  
• Gear external dimensions (in addition to the accuracy of the bore) may vary slightly from batch to batch. Please refer to the real thing! Gear delivery machine rice screws, locking screw spanners need to be purchased separately, no delivery.
  
• We offer a range of teeth between 10 teeth-150 teeth, because the number of links can not show all the limitations, if the link does not have the size you want, you can consult customer service through the link. If you need other specifications, welcome to sample drawings, can be customised according to your requirements.

• According to your choose. 

• We accept Paypal only, It is fast, Easy and Safe.
• Payment must be completed within 7 days.
• PLEASE NOTE: S&H DOES NOT INCLUDE DUTIES, LOCATL TAXES OR ANY OTHER IMPORTATION FEES.
• Please list your special requests (color, packages, etc.) in the PAYPAL NOTES SECTION when you make payment.

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 Shipping 

• We Ship to Worldwide.
• Orders processed within 24-48 hours of payment verification. it will take 15-25 days for delivery. but Customs will random inspection some parcel, so that's why some parcel need more than four weeks to arrive. Shipping time is only estimated and not guaranteed.
• We only ship to confirmed PAYPAL addresses. Your PAYPAL address MUST MATCH your Shipping address.
• Package to USA will Shipping by E-Package with Tracking Number (7-15 Days to Delivered). To other Countries will shipping by Post Air Mail without tracking number (ONLY when the order is over 20USD will supply Tracking Number Shipping Way!) (15-35 Days to Delivered)
• Items are shipped via China Post Air Mail.

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 Guarantee 

• Good quality. Buy with confidence!
• If you are not satisfied when you receive your item, please return it within 7 days for a replacement or money back. Please contact me before you return it.
• Not accept returning of electronic components.
• Full refund after we receive our original item, Note: Return shipping is to be paid by the Buyer.
• We maintain high standards of excellence and strive for customer satisfaction! Feedback is very important to us. We request that you contact us immediately BEFORE you give us neutral or negative feedback, so that we can satisfactorily address your concerns.