CAN INSTALL IN PLASTIC OR METAL UNDER 3/16 THICK. INSTALL IN THE PLACE YOU WANT BY DRILLING A 1/2 HOLE IF THE HOLE IS LARGER IT WILL LEAK . THE VENT WILL SIT IN THE HOLE BEFORE IT IS SEATED IN PLACE THE VENT WILL NOT ROTATE WHEN IT IS INSTALLED YOU CAN USE OIL OR SOAP TO POP IT IN PLACE . I HAVE FOUND A 1 LB RUBBER HAMMER HITTING THE VENT 1 TIME SOILD AND SQUARE IS EASYER THAN TRYING TO PUSH IT IN PLACE. BUT EVERYONE HAS THERE WAY. ANY QUESTIONS JUST ASK AND IF YOU ARE BUYING ANY OF MY GAS CANS I CAN INSTALL THESE FOR YOU FOR THE PRICE OF THE VENT AND CAN AT NO ADDITIONAL COST

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