description mbw screedemon 18' screed bar magnesium this extra rigid, double triangular magnesium screed bar will need two power units (500h) to operate. it minimizes variability in vibration. the bar clamps to screedemon - no holes or hardware through bar. it is attached or removed from screed in seconds for cleaning or transport. allows for offsetting of screed for working under protrusions. california proposition 65 warning. features double triangular design lightweight magnesium material utilizes clamp system - no extra hardware extra rigid design for low vibration variation allows for offsetting of screed for working under protrusions attached or removed from screed in seconds specifications acme tools brand name mbw acme tools part number 17818m assembled weight (lbs) 36 california proposition 65 warning required yes country of origin united states globaltradeitemnumber (gtin) 00400781000082 manufacturer warranty replacement if inspected before delivery is taken package weight 37 package weight (lbs) 37 shipping weight (lbs) 40 upc 400781000082