how to replace a roof vent

{"cid":"91224866","title":"PP Material RV Roof Vent Cover 14 X 14 Inches Universal Rv Vent Cover Replacement","imgUrl":"https:\/\/img.chinax.com\/nimg\/b4\/81\/5d505c5e0b61c1336c006e56f599-200x200-1.jpg","attrs":{"Price":"4.28USD","Minimum Order Quantity":"100","Delivery Time":"25DAYS","Payment Terms":"Western Union,T\/T,D\/P,D\/A,L\/C","Supply Ability":"1000PCS\/25DAYS","Packaging Details":"24sets\\carton, each one have white-box","Material":"PP","Color":"White","Packing":"24sets\\carton","Venttype":"Roof vent","Maintenance":"Easy to clean and maintain","Weatherresistance":"UV resistant and waterproof","Size":"14 x 14 inches","Productname":"RV Roof Vent","Compatibility":"Fits most RV models"}}

{"cid":"91226314","title":"New Car Roof Top Side Air Conditioning Vent A\/C Panel Grille Cover for Mitsubishi Pajelo Montero V93V95V97","imgUrl":"https:\/\/img.chinax.com\/nimg\/e6\/87\/61f51a4890a5b6ae9d3e3c42bbae-200x200-1.jpg","attrs":{"Price":"$4-4.80 \/ pair","Brand Name":"KL","Minimum Order Quantity":"4 pairs","OE NO.":"7842A069HA","Car Fitment":"Mitsubishi","Size":"standard","Purpose":"for replace\/repair","Model":"L200(CHINA\/MMTH), PAJERO SPORT(INDONESIA\/MMKI), L200(BRAZIL), PAJERO(CHINA), PAJERO\/MONTERO(G.EXP), L200(CHINA), PAJERO(KOREA), PAJERO\/MONTERO(G.EXP), PAJERO\/MONTERO(G.EXP), PAJERO(BRAZIL), PAJERO SPORT(CHINA), MONTERO(MEXICO), L200,TRITON,STR","Type":"Fan","Condition":"New","Year":"2006-, 1982-2004, 2006-, 1992-2006, 1990-2006, 2006-, 1991-2001, 1996-2001, 2002-2003, 1998-2002, 2007-2019, 1995-2005, 2008-2013, 2002-2006, 2007-2018, 2015-2019, 2012-, 2017-","Reference NO.":"7842A069HA","Place of Origin":"Hunan, China","Warranty":"1 year","Car Model":"Pajero 2007-2020"}}