The durable plastic shell comes with heavy-duty, easy to assemble hardware.;Each kennel features an easy-open squeeze latch, metal side vents to promote healthy air flow and an interior floor moat to keep your pet dry.;Convenient tie-down strap holes allow you to zip-tie the kennel together for added security during airline travel.;The Ultra Vari Kennelﾃつｮ meets most airline requirements. Be sure to check with your airline well in advance of your travels to learn about their individual requirements.;Medium: 25-30lbs: 28ﾃ｢ﾂﾂｳ x 20.5ﾃ｢ﾂﾂｳ x 21.5ﾃ｢ﾂﾂｳ.