Non-corrosive synthetic parts and durable O-ring sealed;
180°opening hatches; There are 3 sizes available: 4", 6", 8", 4" :External Dia : 5-5/8" 143mm; 6" :External Dia : 7-4/5" 198mm; 8" :External Dia : 9-4/5" 250mm
Slip-Proof Surface : For safe installation on both horizontal and vertial place;
Please feel free to contact us if you have any question about the product. We would try our best to solve any problem for you. Wish you have a good shopping experience.