Our Box One Inner Shift Cable is the perfect upgrade for your Box Three or Box Four cable. It is also an ideal replacement for your Box One or Box Two cable set-up. When combined with our Box One housing it has proved to be superior to most competitive product. We have data that demonstrates lower initial resistance and substantially less difference in resistance over time. FEATURES - Our Best Performing Cable - Slick Coated - Inner Cable 2100mm - (2) 1.8mm Cable End Crimps COMPATIBILITY - Works with 11, 9, 7, 8, 12, and 10 speeds - Weight: 14.6 grams