Check the listing for details. Dew Shield for CelestronC90 MAK. 3D Printed. 143mm Long. Condition: New. Listed at 17.99 USD. PLEASE READ. THIS DOES NOT FIT THE CLESTRON C90 1000MM F11. IT FITS THE REGULAR NWER CELESTRON C90. IF HAVE A CELESTRON C90 1000MM F11 THIS WILL NOT FIT AS ITS SAME DIAMETER AS THE TUBE SO IT WONT FIT INSIDE ON END. Thick 2mm walls, fits good and snug. 143mm long. O.D 104mm Thick Dew Shield for Celestron C90 Mak 3D Printed. Made by Spencer-3D. This is a 3D printed part from Software. 3d Printed by Spencer-3D. Fast shipping as always. . Flexible Tabs for secure fit. SHIPPING CHARGES ARE CHANGING. I WILL BE CHANGING SLOWLY ALL POST TO BE NO LONGER FREE SHIPPING. CHARGES WITH SHIPPING SUPPLIES AND SHIPPING ITSELF HAS GONE UP AND DOING FREE SHIPPING IS COSTING ME TOO MUCH. BUT THAT ALSO WILL MEAN I CAN LOWER PRICES 1 TO 5 DOLLARS ON ALL ITEMS I MAKE AND SELL. SO MY CUSTOMERS ARE STILL GETTING A DECENT AND FAIR DEAL FOR THERE ITEM. BUT WITH THE ADDED SHIPPING THIS ALSO MEANS BTTER SHIPPING OPTIONS, FASTER SHIPPING OPTIONS. THANKS FOR YOUR UNDERSTANDING... MATT