Hipshot Style B Bass bridges are available in a wide variety of string spacing; in your choice of aluminum or brass. Type B saddles feature solid brass barrel saddles, quick release string loading and a variety of contours and shapes. All Hipshot bridges are CNC machined from solid aluminum or brass billet. Precision side-to-side saddle fit provides maximum support for superb tone and rattle free performance. 16mm = .640" 17mm = .669" 18mm = .708" 19mm = .750" 20.5mm = .812"