C3507-18D Slide - Designed for electronic enclosures with heavier chassis sized from 4U to 8U. Heavy-duty with lock-out feature. Lock-out holds chassis in open position. One-Motion Insertion. Simplifies reinsertion and installation of heavier loads. Guide pins provide stability for cable management attachment directly to slides. Rear bracket kit provides two inches [50.8 mm] of adjustment. Prop65 Warning: This product can expose you to chemicals including nickel, lead, which are known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov.