(VARIABLE SPEED) The new Ultra Centrifuge is nearly indestructible! The one-piece aluminum alloy cast body is stable and strong, while the wide stance eliminates vibration and wobble. The new triangle design saves lab space and can be easily tucked into the corner of your counter. It is difficult to break this centrifuge ... even if it is loaded off balance. The Ultra is available with variable speed for spinning fluids, or fixed speed at a lower cost for labs spinning blood only. Features include: 8 test tube capacity, spins test tubes from 3ml - 15ml, suction cup feet, impact-resistant, safe-view lid, safety shut-off switch in lid, locking lid and 30 minute timer. Specifications: 3,300 rpm fixed or variable speed, nominal RCF = 1,327g, 110V AC (220V available).