The Wheaton Overhead Stirrer is a compact unit with solid state speed control capable of providing RPM/torque combinations for most laboratory operations such as homogenizing or mixing. Stirrer should be attached only to tissue grinders with PTFE pestles and with stainless steel rods. Unit and motor are mounted in a housing with epoxy finish and is provided with a 6" aluminum rod and clamp for attachment to support stand. Keyless chuck accepts shaft sizes to 5/16" (7.9 mm). (Support stand not included.) Specifications: Speed Range: 300-5,000 RPM (No load). Electrical Requirements: 120 VAC, 50/60 Hz, 50 watts. Dimensions: 4-1/2 x 5" x 12" (11.5 x 13 x 30 cm). Weight: 6 lbs. (2.7 kg).