This  BioComp Instruments Navigator Model 128 Roller Bottle Type Blotter Rotatoris in real nice condition and functions 100% . It came from a lab that was upgrading equipment. We can accept pay- pal or your credit card. Please email me with any questions. .

 6"  size , NO bottle

The economical Navigator™ excels at all your blotting needs; Southerns, Northerns, Westerns, Chemiluminescent or Sequencing blots.
Three features set it apart: as a roller bottle-type blotter, it saves up to 90% on precious reagents compared to trays, but the Navigator goes one step further. Its patented tilting feature lets you concentrate the reagents over the blot, no matter how wide they are. Tilt back a few degrees from horizontal, put your blot to the bottom of the bottle and the small pool of reagent will stay over the blot rather than wandering on and off during rotation.
The second feature is intuitive and obvious but available nowhere else: "Make the bottle fit the blot." Most commercial blot developers offer one or two bottle diameters because if the bottles were any wider, the rotating rotisserie could not hold them. As a result, the filters must be rolled up with a nylon mesh to permit the exchange of reagent. The mesh increases buffer consumption and slows reagent exchange so starvation leaves shadows in Western and Chemiluminescent blots. Clearly, then, the best bottle for all types of blotting is one having a inner surface area that matches the size of the membrane so that every revolution bathes the entire surface of the blot in reagent.
But how to achieve such freedom? The answer is our patented MagnaBase™ bottle system. A strong magnetic disc on the bottom of our bottles holds them firmly to the rotating steel plate on the Navigator. As a result of this simple invention, one can...
• Change bottle sizes without changing clips.
• Use the entire surface of the plate and attain high holding capacity.
• Run several different sizes of bottles at the same time

Two size steel plates for different blotting needs: 6” and 10” diameter.
•Speed - 6-20 RPM
•Adjustment - manual knob
•Drive - Stepper motor w/Dual Heavy Duty Ball Bearings
•Tilt Mechanism - Manual
•Adjustment - Locking "T" handles
•Tilt Range 0-95° from vertical
•Operating Temperature - Ambient to 65°C continuous duty
•Power Requirements - 100-120V AC, 0.3A; 50-60 Hz

Details:
• Tilt Angle Adjustment. This patented concept offers tremendous reagent savings. By placing your smaller blots around the bottom of the bottle and tilting the Navigator slightly back from horizontal, you force the smallest possible volume of reagent to lie on your blot. You will normally need only 2.5 ml to cover a 12 x 15 cm blot. However, a 1 x 10 cm strip in the same bottle requires only 0.3 ml if the bottle is tilted back to 88.5°. We like to think of it as creating an infinite set of bottles from one. * U.S.A. patents 4,753,892 and 5,171,539 .
• High temperature blotting. The Navigator fits into virtually any incubator (minimum inside dimensions of 12"W x 12"D x 12"H) and is rated for 65C continuous operation.
• Rotation Speeds of 6-20 RPM. A perfect range for all your blotting needs. Speed is based on an electronic stepper motor drive that delivers constant RPM regardless of machine warm up or wear in. The instrument is unbelievably quiet and smooth.
• Plate Sizes. We offer a 6" (15 cm) and 10" (25 cm) plate for low and high volume work. They are interchangeable so you can scale up if demand increases.
• Low price. Compare the cost of the Navigator with any other blotting device on the market and you will quickly see what value it offers.