This Thousand Oaks 1"x 15" (25mm x 38cm) Heater Band (.94amp) for 2.5" to 4" Telescopes is intended for use with the Thousand Oaks 4-Channel DDHC Digital Heater Control Unit. Up to four heater bands can be used with the controller.
Reviewed by 1 customers
I use this on my 4" telescope and now I can enjoy "dew-free" viewing as this item is a perfect fit and keeps the optics from fogging up. Very satisfied and highly recommend!