DEMINSION: 8.5" x 3.5" x 2.5" with 1/2" frag holes MATERIAL: 100% Aquarium safe epoxide resin / waterproof sealed N52 Neodymium Magnets ADAPTATION: For up to 1/2" thick GLASS aquarium, not recommended for acrylic aquarium FEATURE: Simulate real live rock structures and textures, perfectly blend into your reef DEMINSION: 8.5" x 3.5" x 2.5" with 1/2" frag holes MATERIAL: 100% Aquarium safe epoxide resin / waterproof sealed N52 Neodymium Magnets ADAPTATION: For up to 1/2" thick GLASS aquarium, not recommended for acrylic aquarium FEATURE: Simulate real live rock structures and textures, perfectly blend into your reef