Hahaemall 8FT American Single Sliding Barn Door Hardware Best Heavy Track Hanging Kit (J shape hangers) BrandHahaemall condition: New Surface: Black frosted, corrosion protection Material: High quality Steel. Door weight : 150lb - 230lb, Door panel thickness:13/8''and 13/4'. Passed the test of opening - closing: 100000 times. The rail hole-space is pre-drill 16'', It is the 16" US standard distance layout. Detailed instruction: use both words and pictures to display the steps of installing the barn door hardware 8FT kit's Package Include: Roller(4) Stopper(2) Sliding track(1pc*8ft ) connector(6) Anti-pad:(4) Floor guide(1) Installation manual(1); Hardware Only,DOOR NOT INCLUDED. Warranty : 5 years, We provide customized service. Meet all of your need. We will Ship Replacement Parts for any damaged or missing pieces at no charge. If you want to buy extra sets of J-Shape Hanger to install more doors, this is purchase ASIN: B01M29G8GS, This J-Shape hanger is compatibale with our J-Shape sliding door hardware kit.