Acrylic domes are made of durable shatter resistant acrylic and PETG is a copolyester that is an amorphous thermoplastic. PETG offers excellent impact resistance, and is more lightweight than polycarbonate. Provides 90, 180, and 360 degree viewing for ceilings and walls. Excellant clarity. Ideal for retail, warehouse, office or public areas. One inch of mirror diameter equal one foot of panoramic viewing area. Easy to install, mounting hardware supplied where required.