• Overall Dimension of Plastic (includes flange) 21 1/4" x 21 1/4"
• Flange 1 1/4", Dome dimension 18 3/4" x 18 3/4"
• Thickness .118 Approximately 1/8"
• Height of Outer Dome 4"
• Height of Inner Dome 3"
• Material: Acrylic or Polycarbonate (impact resistant)
• All inner domes are acrylic even if Polycarbonate is selected (only concerned with the outer dome being impact resistant)
• Dome tape only included with Double Dome orders
• Gradual Rise Profile (will not work with vertical rise or dome over frame units, contact us for helpful information regarding those shapes)
  
• We make all sizes! Please contact us if you need the size to be special.

This product is designed for use in an existing residential/commercial framed gradual rise skylight where the frame and retainer are screwed together to hold the plastic in place.  There is no such thing as a STANDARD size or deduction between the Outside of the retainer frame and the plastic underneath.  Please remove screws and measure tip to tip of plastic prior to ordering.