TRASMITAL BONFIGLIOLI , Transmixer Drives Trasmital Bonfiglioli Division of Bonfiglioli Riduttori S.p.A Type: 310L353.OHZ5GDOANAWOA 2T310L3053013 ?? RATIO TO 1/ 53.0 SERIAL # 01023064 DATE 03/01 Type: 310L353.OHZ5GDOANAWOA 2T310L3053013 B4 RATIO TO 1/53.0 SERIAL# 01023063 DATE 03/01 35" long 16" diameter in the middle of unit.