Made from billet aluminum and machined for a 1" seat tube with 9" bolt centers.
Specially machined center allows for submarine belt clearance.
Can be stacked from 1/2" up to 1-1/4" tall.
WARNING: These products may contain a chemical known to the state of California to cause cancer and birth defects or other reproductive harm. For more information, go to www.p65warnings.ca.gov.