All Rondo strings are orange at the peg end and green at the ball end. Rondo only comes in one tension. An additional A (XP) was introduced in 2022. Read what the manufacturer says https://www.thomastik-infeld.com/en/new-releases/rondo/cello
$ 62.50 A carbon steel core, wound with multialloy Ball is brass with hole 18.8 kg 41.4 lbs
$ 71.00 A (XP) carbon steel , softer, more sensitive to bow pressure 18.1 kg 39.9 lbs
$ 61.45 D carbon steel core, wound with multialloy Ball is copper with hole 14.3 kg 31.5 lbs
$140.00 G spiral core, wound with tungsten/chrome Ball is chrome 14.3 kg 31.5 lbs
$163.00 C spiral core, wound with tungsten/chrome Ball is brass 13.8 kg 30.4 lbs
