4", slips 1/8 ip, zinc, offset crossbar, use for mounting light fixtures when extra space is required for wires, includes 2 each 8-32 x 1/2" mounting screws.
WARNING: This product can expose you to chemicals including lead, which is 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.