description 1 in. square head for concrete vibrator designed with hardened steel, the wyco square head provides higher force levels, greater amplitude, longer wear, and unmatched reliability. the square head design provides 22% more displacement, and offers 20%-50% faster consolidation. california proposition 65 warning. features features a constantly changing vibration pattern provides 22% more displacement offers 20% to 50% faster consolidation is more effective in low-slump concrete than round heads designed with hardened steel, the wyco square head provides higher force levels, greater amplitude, longer wear, and unmatched reliability optional polyurethane coated heads to prevent rebar damage 310 lbs. in force @ 10,500 vpm width of vibration: 7 to 10 in. specifications acme tools brand name wyco acme tools part number w877-526 assembled weight (lbs) 2.5 california proposition 65 warning required yes color / finish silver country of origin united states globaltradeitemnumber (gtin) 00423877000025 handle length (in) 13 internal supplier part # w877-526 internet product code (ipc) 572c0eaab31 manufacturer warranty one year limited manufacturer warranty. see owner's manual for details material hardened steel package contents square concrete head package quantity 1 package weight 5 package weight (lbs) 5 size 1 in. upc 423877000025 used with sure speed concrete vibrator width (in) 1