The thread of bed legs is NON-UNIVERSAL. To measure the original feet easily, prop up one corner of bed frame, screw off leg with no tools, compare with phone charging cables as shown in the picture. Compatible with Metric M8 & M10, Standard 3/8 & 5/16 thead, NOT fit others, and screw length 0.78 inch. Thick metal bed legs can't used to extender a exsiting leg 9 inches height is fixed and not adjust Each package have 4 pcs bed legs The 4 pack 9 inch round metal tube bed legs post compatible with many bed brands,

Such as tempur pedic sealy serta sleep number lucid adjustable bed frame.

As the product supplies 4 kinds of bolt thread, contian Metric M8 M8-1.25 M10 M10-1.5 and Standard screw thread 3/8 & 5/16,

But pay attention there are other thread bed frame, which will not compatible, such as M12

The installation of bed leg does not need any tools, just screw off an original leg from bed frame and screw on the new leg post by hands

The thicken 2mm metal tube legs is heavy and supplies high load capacity, can support heavy metal bed frame and heavy mattresses

One piece design supplies big load capacity but the height is not adjustable, make sure what's height you need, we supplies 2 inch to 14 inch fixed height metal legs

And please keep in mind that the metal leg is not designed to extender a exsiting leg, this can't add on other leg post.

The leg also used as furniture replacement legs, such as sofa cabinet leg and so on.