SHESHOU 0.8mm White 2520 cut @ 14cm Active..9.5mm Steel Ball - 3.56g#1  256fps#2  258fps#3  255fps#4  257fps#5  258fpsAvg = 250fps11mm Steel Ball - 5.48g#1  226fps#2  232fps#3  228fps#4  228fps#5  231fpsAvg = 227fpsConclusion: SHESHOU 0.8mm White are Very Deadly Excellent need i say more?  --update I reviewed Sheshou 0.8mm i really like it so far, i had try different cut like 2520(2520 means 25mm tapered to 20 mm, the same below) and down to 2315 but preform very very well with 9.5mm steel ball as for 11mm steel ball 2520 are much more suited beside from Sheshou 0.8mm i had also bough a 2m roll of Sheshou 1mm, i've try 2520 but it was to a point cery close to un pullable so i go down to 2015 still had stong draw weight how ever with the strong draw it can shoot 11mm steel ball up to 230fps max, than i just can't draw any more i think i need to go down the tapper even more as long as Sheshou don't change the formula for the 0.8mm white i would buy more for sure.    I don't pull the band to the most, just normal elongation ratio. When i use my normal cut 2520(25mm tapered to 20mm) with SHEHSOU 1.0 band, it was too strong for me to draw back so i go down a little 2315 still a bit strong than i try 2015..getting better so i try some 9.5mm steel ball it was very powerful getting avg 255fps, than i try 11mm steel ball i am also getting 230fps SHEHSOU 1.0mm are Very Very Powerful i think i will try go even thinner cut 1812 to see if it will give me softer draw and at the same time can give me good fps with 9.5mm or 11mm steel ball..