rev-a-shelf 4wctm series are designed for door mounting onlythe rs4wctm series is designed for absolute sturdinesswith rear adjustable mounting brackets for variances in cabinet depthall rs4wctm series come fully assembled and are constructedwith solid maple wood framesthe rs4wctm series comes in four different versions toaccommodate 1-1/2", 1-5/8" and 1-3/4" face frame andframeless applicationsunits are equipped with heavy duty ball bearing slideswith 1" over-travel capable of 150 lb. maximum loadssingle bin units are available with 35 qt. and 50 qt. bins,while double bin units are available in two 27 qt., 35 qt. and50 qt. binssingle 35 qt. trash pull outs include a plastic storage bin atback of unit (9-1/2" length x 6-1/2" wide x 5-5/8" deep) atback of pull outwaste bins are available in whitereplacement bins are sold separatelyspacer kits available for custom applications and can add up to 1-1/2" per sidedoor mount brackets are included with every trash pull out.