Hoffman Electrolysis Apparatus with PTFE Stopcock provides an effective and quantifiable method for electrolysis of water into hydrogen and oxygen Browning RF-4511 Mounted Bearing BRG01561 2-3/16 Bore, HB6 External key on most sizes for positive drive and greater torque carrying capabilities Browning R1-2-15/16 Split Taper Bushing 2-15/16" Bore - New in Boxitem 3 Browning R1-2-15/16 Split Taper Bushing 2-15/16" Bore - New in Box. £61.09. + £84.95... Solid flange to maintain concentric bores Double-split barrel for positive clamping Available in inch, metric, and spline bores. R1 2 15/16 Split Taper Bushing 2-15/16 Bore 1/2 TSUBAKI R1-2-15/16 2-15/16IN SPLIT TAPER BUSHING R1 2 15/16 Split Taper Bushing 2-15/16 Bore 3/4