3ct. - S-Shape Airlock with #6 Stopper - Set of 3 (Bubble Airlock)<img src="http://ecx.images-amazon.com/images/I/31U34CdgwAL.jpg" noproxy><img src="http://ecx.images-amazon.com/images/I/31b%2Ba9Cre9L.jpg" noproxy>