Product Description: Maintain crystal-clear optics with the R-Sky Dew Heater Strip for 5” Telescopes. Designed for refractors and compact catadioptric systems, this dew heater ensures your telescope's front lens remains fog-free in humid or cold environments. Perfectly suited for ~125–130mm optical tubes, this heater delivers even, regulated warmth to eliminate condensation without overheating. Whether you're imaging deep-sky objects or enjoying planetary views, this accessory enhances your experience by preventing dew buildup throughout your session. 📌 Fits optical tubes approximately 5” (125–130mm) in diameter.