ENHANCED VIEWING - Features a 36.4mm male thread for secure telescope connection, ensuring stable and clear images during astronomical observations, reducing vibrations. VERSATILE COMPATIBILITY - Adapts to 1.25' eyepieces, broadening your range of usable accessories and enhancing observational flexibility for diverse astronomical instruments. PRECISION ADJUSTMENT - Offers an adjustable optical length from 29-35.5mm, allowing fine-tuning for optimal focus and image clarity, crucial for detailed observations. ROBUST DESIGN - Crafted by Baader Planetarium, ensuring durability and precise fit, providing a reliable connection between your telescope and eyepieces for long-term use.