- MCS Low Speed Straight Inner Coolant Chanel: - Low speed handpiece. - 1:1 direct drive Spray. - Inner channel Bur applicable. - For surgical Ø2. 35 mm. -Rotation speed: maximum 40, 000 rpm. *Note that extra delivery fees may be applied to this item. For more info contact Toothpick Customer Support or check out Terms and Conditions policy.