Thick 4mm walls, fits good and snug. 200mm long.  I.D of Dew Shield 60mm.

Thick Dew Shield for  skywatcher evoguide50DX  Guide Scope. 3D Printed. Made by Spencer-3D. This is a 3D printed part from Software. 3d Printed by Spencer-3D. Fast shipping as always. Also comes with cap that fits the Dew Shield.  Strong durable pla plus filament plastic material.