Strong tightness offering excellent resonates, Normal and Hard tension for Choose Good feeling, Service, full tone. The strings of -NX 35-C series has strong durability, clearly timbre and feeling comfortable. Model: NX35-C High-Quality Nylon + Polyester Nylon Core Color: Black Silver Plated Copper Wound NX35 - Hard Tention: E-lst Clear Nylon: 0.028 inch / 0.71 mm B-2nd Clear Nylon: 0.032 inch / 0.81 mm G-3rd Clear Nylon: 0.040 inch / 1.02 mm D-4th Silver-Plated Copper Wound: 0.030 inch / 0.76 mm A-5th Silver-Plated Copper Wound: 0.036 inch / 0.91 mm E-6th Silver-Plated Copper Wound: 0.045 inch / 1.14 mm Package: 1* guitar Strings (6pcs/set) Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.