<BR>Moose rear sprockets are made of 7075 T651 aluminum and are available in 4 different colors.<ul><li>The 7075 T651 aluminum we use for these sprockets receives an extra tempering which reduces distortion and provides optimal thickness vs. typically thinner 7075 T6 sprockets</li><li>100% machined, no stamping or grinding</li><li>Optimal tooth thickness results in maximum tooth and chain contact</li><li>We leave the "cleaning" grooves out of our sprockets, because more aluminum contacting your chain means longer chain and sprocket life</li><li>Moose rear sprockets come anodized in black; select Moose rear sprockets are available in Red and Orange</li><li>Made in the USA</li></ul><p>**NOTE** You will receive the same pitch sprocket as you bike has for OEM. Ifyou upgraded your sprockets and chain to a different size other than stock pleasecontact us so we can make sure you will receive the proper sprocket.</p>