Color: black, brown; Package Content: 1 x Aquarium CO2 Diffuser Total Size: 7.3 x 4.5 x 3cm / 3" x 1.8" x 1.2" (LWH); Material Material: Plastic, Rubber Net Weight: 30g;Product Name: CO2 Aquarium Diffuser Outlet Dia: 1.5mm/0.06" Suction Cup Dia : 2.6cm / 1"