Urethane hopper to barrel joint up grade

Up grade kit for older gold trommel units, (cube trommels, lil monster trommels pre 2018)
This kit eliminates rock jams and grinding noise, worn out pvc collars from sand and small stone. 
Hand ported inside throat to speed up material entering the spinning barrel .
Hopper modification is required to install kit, hopper material gate also included. See install video for installation