18″ Clear Acrylic Hemisphere

(1 customer review)


Hemisphere is 18″ in diameter at the base not including the flange.

Please choose your flange width from the dropdown below.
The flange width has no impact on the size of the dome.

  • No Flange: 18″ outside diameter at the base.
  • 1/2″ Flange: 19″ outside diameter at the base.
  • 1″ Flange: 20″ outside diameter at the base.
  • 1 1/2″ Flange: 21″ outside diameter at the base.

Please call us at 909-326-0904 to order. Orders of 24 or more qualify for a quantity discount.

SKU: HEMI18 Category:

Our stock plastic hemispheres are fabricated from 1/4″ thick, clear acrylic. As the plastic is stretched to make the hemisphere, the leading edge of the hemisphere will shrink to about 3/16″ thick, and the apex (top) may be as thin as 1/16″. Hemispheres ordinarily come with a 1.5″ flange. For Example: a 12″ hemisphere with a 1.5″ flange would have an overall outside diameter of 15″ (4″ hemisphere comes with 1/4″ flange). We can custom size your flange or ship the hemisphere without a flange. Please specify when placing your order. If you are planning to make your hemispheres into a sphere or globe, please let our salespeople know in advance or visit our plastic spheres page for more information.

Additional Information
Weight 3 lbs
Dimensions 20 × 20 × 20 in

No Flange, 1/2" Flange, 1" Flange, 1.5" Flange

Reviews (1)

1 review for 18″ Clear Acrylic Hemisphere

  1. Aaron Brougher

    Used their 18″ hemisphere with a 1″ lip for an alien UFO prop at Halloween. Since my needs were not “normal”, they talked through everything with me over the phone. The dome was exactly what I needed and performed flawlessly. Not sure I’ll ever need another one, but I would buy from them again for sure.

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