Astrozap Dust-Cover For 16-Inch Ritchey Chretien Telescopes: This Astrozap Dust-Cover is designed to fit 16-Inch Ritchey Chretien Telescopes with up to an 18-inch Outside Diameter. The Astrozap Dust-Cover's construction of durable cotton/ nylon blend and sewn in elastic band, ensures to keep excessive dust away from its optics. 

Note: Image depicts a cover on a Dobsonian. The cover you'll receive is identical to the one pictured but sized to fit a 16-Inch Ritchey Chretien Telescope. Manufacturer Product Number: 1416