One wire version of b66 for use with micro adjust seat postsa single rail coil sprung design for micro adjust seat posts rails chrome weight 850g width 210mm length 260mmbag loops on back of saddledont forget to use proofide regularily to ensure maximum comfort and longevity of your saddle the brooks maintenance kit is the ideal partner for your saddle providing a tin of proofide a tension spanner and the brooks cleaning cloth