Product overview Two complete 6 string sets, 12 strings total, for replacing worn strings or trying alternative gauges. Compatible with both acoustic and electric guitars. Color coded strings make identification and restringing faster. Materials include stainless steel, nickel plated steel, and colorful coated copper alloy. Key features and benefits Two complete sets included: 12 strings total for immediate replacement and a backup set. Color coding by string for quick identification during restringing or teaching. Mixed materials for balanced tone and durability: stainless steel for the strings, wound bronze alloy for the lower strings, and a nickel plated steel option in the second set. Long service life for regular practice and performance use. Provides two gauge options so you can choose a different feel or tone without buying separate sets. Specifications First set gauges and materials: 1st E: 0.011 inch (0.28 mm) stainless steel 2nd B: 0.015 inch (0.38 mm) stainless steel 3rd G: 0.024 inch (0.61 mm) red bronze wound 4th D: 0.032 inch (0.81 mm) yellow bronze wound 5th A: 0.042 inch (1.07 mm) blue bronze wound 6th E: 0.052 inch (1.32 mm) green bronze wound Second set: Nickel plated steel, strengths 010w, 013w, 023w, 032w, 042w, 050w Materials: stainless steel, nickel plated steel, alloy; made of colorful coated copper alloy Length: listed as 1 m (40 inch) and also as 110 cm Package contents: 12 x guitar strings (two complete 6 string sets). Only strings included. Practical applications old or broken strings before practice, recording, or a gig to restore playability. Use color coded strings for teaching beginners to identify string names and positions quickly. Switch between the two included gauge sets to compare feel and tonal response without extra sets. Additional notes Only the listed package contents are included. Other items shown in example images are not included. Color may vary slightly from images due to lighting and display differences. Measurement tolerance is plus or minus 1 to 3 cm.