Colour:Green Size:Inner Dia 17.6mm Quantity:1 batteries required:No Batteries Included:No Item Weight:28 g Specification: Condition:100% Brand new Material: Plastic Color: White / Green(Optional) Inner diameter for S: 1.46cm / 0.57in Inner diameter for L: 1.76cm / 0.69in Package List: 4* Clamp 4* Suction Cup Notice: Please allow 1-3cm error due to manual measurement and make sure you do not mind before ordering. Please understand that colors may exist chromatic aberration as the different placement of pictures. NoteMake sure to keep both suction cups and glass surface clean and dry. Replace the old and worn down suction cups timely. Durable Plastic MaterialMade of high quality plastic material, high hardness, not easy aging, very durable. AdjustableEach suction is used with one clip. You can easily adjust shape and position of air tubing. ApplicationPerfect for both salt and fresh water fish tank, aquarium and any glass or stainless steel surface. Fit forInner diameter 14.6mm is suitable for tube whose diameter is 15-18mm and inner diameter 17.6mm fit for 18-24mm tube. See more product details NoteMake sure to keep both suction cups and glass surface clean and dry. Replace the old and worn down suction cups timely. Durable Plastic MaterialMade of high quality plastic material, high hardness, not easy aging, very durable. AdjustableEach suction is used with one clip. You can easily adjust shape and position of air tubing. ApplicationPerfect for both salt and fresh water fish tank, aquarium and any glass or stainless steel surface. Fit forInner diameter 14.6mm is suitable for tube whose diameter is 15-18mm and inner diameter 17.6mm fit for 18-24mm tube.