Two For One(TFO) Cotton Spindles RPM Suitable Bolster 70mm, 110mm 8000-12000 HF 55/HF 2C 125mm 8000-12000 HF 3C 140mm, 160mm 8000-12000 HF44 All Size of Two For One twisting spindles are available such as 50 mm, 60 mm, 70 mm, 90 mm and 140 mm. Two types of coatings are available in Aluminium Pot.