... the tilt-up wooden door and aluminum door gas spring , gas support , Applicable to the tilt-up wooden door and aluminum door , different sizes ... or customize according to your door's weight .Code : ES11, Gas source : air/nitrogen2, Lift load : 50N-200N3, Lift distance : 90mm4 ... /2-force technology10, Product quality : 100,000 times quality guarantee gas spring and gas support