Comparison : Item # UGF307-23, Eccentric Collar Locking Four-Bolt Flange Unit, UGF300 Series
Item # UGF308-24, Eccentric Collar Locking Four-Bolt Flange Unit, UGF300 Series
Item # UGF309-27, Eccentric Collar Locking Four-Bolt Flange Unit, UGF300 Series
Item # UGF310-31, Eccentric Collar Locking Four-Bolt Flange Unit, UGF300 Series
Item # UGF311-35, Eccentric Collar Locking Four-Bolt Flange Unit, UGF300 Series