ZWO FILTER MASKS FOR EFW For EFW:EFW 7x36 a precise 50mm hole offers

a precise 50mm hole offers a smooth movement on the shaft and facilitates the balancing operations while the stainless steel guarantees no corrosion

This 170mm Vixen bar is ideal for short refractors

Width 90 mm

AZ2000 HPS Mount –  with precision absolute axis-encoders

for these instruments

ZWO FILTER MASKS FOR EFW For EFW:EFW 7x36 a precise 50mm hole offersThe ZWO 0. 5mm thick filter masks allow you to securely install 31mm or 36mm unmounted filters into your EFW or EFW Mini electronic filter wheels. Includes M2 screws. Remove the screws securing the back cover and remove the back cover Place filters onto the filter positions. Use the included M2 screws with masks to secure the filters in place. Replace the back cover and tighten the screws. ZWO EFW Mini Filter Mask dimensions ZWO EFW 7 x 36mm Filter