GHS Strings CB-GBTNT Coated Boomers Nickel Plated Electric Guitar Strings, Custom Model: CB-GBTNT Featuring the air-tight Fresh Pack & Nitro-Pack singles, guaranteed fresh from the factory! Coated Roundwound Nickel-Plated Steel Outstanding extended performance life and powerful tone. Thin & Thick Gauge: 010-013-017-030-044-052