Brand new one way check valves<br>Small and compact<br>Fit standard aquarium air pipe of 4mm inner diameter<br>Length: approx. 5.5cm<br>10 X One way check valve<br /><img src="//agdetail.image-gmkt.com/m430/936/492/558492936/img/agdetail.image-gmkt.com/936/492/558492936/img/img6.eachbuyer.com/x1/p18/bv00_1.jpg" />                                                        <img src="//agdetail.image-gmkt.com/m430/936/492/558492936/img/agdetail.image-gmkt.com/936/492/558492936/img/img6.eachbuyer.com/x1/p18/bv00_2.jpg" />                                                        <img src="//agdetail.image-gmkt.com/m430/936/492/558492936/img/agdetail.image-gmkt.com/936/492/558492936/img/img6.eachbuyer.com/x1/p18/bv00_3.jpg" />                                                        <img src="//agdetail.image-gmkt.com/m430/936/492/558492936/img/agdetail.image-gmkt.com/936/492/558492936/img/img6.eachbuyer.com/x1/p18/bv00_4.jpg" />