This Vacuum attachment is designed and compatible for 11" & 14" K&M Krushers
VCG Ventura is a great manufacturer and they do not cut corners on parts to manufacture these units
Heavy duty construction Turns rock into a talcum power like dust 100-200 Mesh 500-1000 Lbs per hour ready to process and get your GOLD
They each weigh 1Lb 7oz
the hammer head is filled with 12 ounces of shot to absorb shock & maximize the Force of each strike
Manual on Fire Assaying to Separate Nobel Metals (Ag,Au,Ir,Os,Pd,Pt,Rh & Ru) MYOGB-100-240 This Vacuum attachment is designedDetailed directions are given for use of fire assay techniques to separate and concentrate the noble metals (Ag, Au, Ir, Os, Pd, Pt, Rh, and Ru) from many types of samples. Also included are methods used by the Geological survey. By: Joseph Haffty, L. B. Riley, and W. D. Goss