19 Inch Racking Questions

Hit there. Was wondering if these threaded rails have 1/2u spacing? I’d like to use 1/2u ventilated blanks between each 1u. Is that possible with this rail?
Thank you for your enquiry, These R0828-10 rails have 3 mounting holes per "u" Regards Penn Elcom
Can casters be attached to the R6412V-W-M6?
Thank you for your enquiry, The R8480 casters Regards PennElcomOnline
Do this come in pairs.
Thank you for your enquiry, These R8840/26 units are sold individually Regards Penn Elcom
Hi can you tell me the distance between the front rack strips? I want to be sure that the handles on the amplifiers and the front mounted XLR plugs will fit.
Thank you for your enquiry, The R8400-12 rack has an external depth of 480mm / 18.90". The distance between the rack rails is 447mm / 17.60". Leaving a space of 16.5mm / 0.65" from the rail to the front of the rack Regards Penn Elcom
What's the legnth of the 9 U rail. 405mm?
Thank you for your enquiry, 403.25mm / 15.88" is the total lendth of a 9u Regards PennElcomOnline
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