The 900 Golden Superior® set contains gold nylon trebles and polished Golden Alloy wound basses. Especially designed for the concert performer, the smooth surface on the basses allows the player to shift positions without any noise or squeak. Highly polished, these basses are recommended for both studio recording and live performances.- Warm tone, polished basses for reduced finger noise- Tension: Medium- String Gauges: Gold Nylon .028, .032, .040, Golden Alloy: .030. .035, .043- Made in the USA with American Wire- Packaged using MAP Technology (Modified Atmosphere Packaging) to prevent tarnishing and ensure freshness