We create our custom frames using only the strongest 7/8″ – 1 1/2″ hard drawn marine tubing to stand up to the harsh weather of the Pacific Northwest. We use Black or White Coats Polymatic UVR Gore Tenera threads and we always use YKK entry and captains zippers. In addition to these, we carry Makrolon Polycarbonate, or, Crystal Clear for the glass. However, items may be switched to customer’s discretion.