Magnet: AlNiCo V

String Spacing:All 50mm

Resistance: Neck 8.1K, Bridge 8.55K

BB1 : designed for the Neck position, uses Alnico 5 magnets

BB2: designed for the bridge position, uses Alnico 5 magnets

Hence, the pairings you’ll often see are BB1/BB2. 4-wire cord for split purpose