2 mirone adjustable airplane seat belt extenders extension for all airlines (7-32 inch), e-9 safety certified (type a & b) mirone - one black seatbelt extender compatible with all airlines other than southwest, and one blue extender compatible with southwest airlines (except newer 737-800/737max8 planes. make sure to check the type of plane you will be flying on). our seatbelt extenders are e-9 safety certified for up to 3000lb of pressure. may not be compatible with first class seats.<br> - 2017 improved version. our seatbelts are made of high strength polyester. <br> - both seatbelt extenders are easily adjustable up to 32 inches, using the same mechanism as airline seatbelts.<br> - each product comes with an owners card for proof of ownership. <br> - easy to store. simply roll up each belt and keep it in your pocket , bag, or luggage.<br>