This bundle includes four goods (may deliver separately):4FT full set hardware X1 + 4FT Extention tune X3 [4FT full set hardware] including: Top roller*2pcs; Floor roller*2pcs; 4FT around tube with 2 bracket*1pcs; Stop*2pcs; End cap*2pcs; Screws*1set [4FT track only] including: 4FT round tube with 2 bracket*1pcs; Joint-in tube connector DIYHD Round Tube Sliding Ladder Hardware,Tensible Stand Up Rolling Wheel Only sliding ladder hardware for sale,Wooden ladder is NOT included Material:Metal+Aluminum; Surface:Black / Brushed for selection Rollers&; position when in use Stand up the rollers to avoid wasting space Full set hardwareSliding Rail: Tube diameter:25mm Thickness:3mm The size between 2 bracket:19 5/8” Bracket length 3/18”, Screws for bracket size 1 1/4”; Make yes the place where you install the song have no less than width:3 1/8”;thickness 1 1/4” for set up The transport fee does not include customs tasks and desires to be paid by means of the customer! Gallary for reference Similar item fron DIYHD This sliding hardware can fit ladder as below: