Plastic construction one piece, open bottom for viewing insects and small objects, clear acrylic sides for light to pass through. 1.8" diameter lens, 8x magnification fixed focusing. Bottom diameter 2.25". Total height 2.1". Plastic construction one piece, open bottom for viewing insects and small objects, clear acrylic sides for light to pass through. 1.8" diameter lens, 8x magnification fixed focusing. Bottom diameter 2.25". Total height 2.1".