Top Gun Bolt-In Z-30 Bases - PairAn innovative advance in Top Gun engineering, Rupp's Z-30 gear drive system offers unmatched ease of operation for top mount outriggers. Simply turning the palm-size handle deploys and retrieves riggers smoothly and effortlessly with an outstanding 30 to 1 advantage. Z-30 Top Guns are engineered for durability with a high strength, forged aluminum body that protects cutting edge components. Now with anodized aluminum knob and other enhancements. Forged 4" x 6" mounting flange provides ease of BOLT-IN installation and below top operation. Designed to accept Rupp Top Gun poles in 15' or 18'.WARNING: This product can expose you to chemicals including Chromium (hexavalent compounds) which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information go to P65Warnings.ca.gov.