uxcell Adjustable Sucker Aquarium Fish Tank Food Feeder Feeding Ring Blue Color: Blue, Black; Package Content: 1 x Feeding Ring Total Size: Frame Size: 10 x 10cm/ 4" x 4"(L*W); Material: Plastic, Rubber, Foam Product Name: Feeding Ring; Net Weight: 38g Total Length: 15.5cm/ 6.1" Suction Cup Dia: 3.9cm/ 1.5"