Nordson® Compatible Pneumatic Tray KitThe pneumatic tray controls incoming air pressure to your hot melt pump.  This is a critical part you will want to stock.  Once this part hits it’s end of life, the melter will not run, causing costly downtime.This pneumatic tray kit is a cost-effective and convenient solution for replacing your existing pneumatic tray kits on ProBlue® Melters.  Another advantage of working with Keystone Industries®? Our passionate, customer-focused team.Kit Details Fits in the bottom of ProBlue® 4, 7 & 10 melters.