Nuohong component reference,Confirm final drawing before order Sleeve material,Q235 steel Sleeve diameter,60 mm reference; other sizes by drawing Sleeve length,195–400 mm Wall thickness,2.5 / 3.0 / 3.5 mm Longitudinal slot,14 × 150 / 16 × 140 mm Sleeve process,"Cold rolling, as specified in the reference sheet" Sleeve finish,Uncoated or electrogalvanized Reference ring-nut material,QT450-10 ductile iron Reference ring-nut size / weight,60 mm designation / 330–850 g Reference ring-nut finish,"Uncoated, electrogalvanized or hot-dip galvanized"