Agitator assembly is constructed of 316L stainless steel and screws into the M30 thread in the center of the headplate. Design ensures contamination-free sealing around the shaft. CLS-1385-05 attaches to the headplate with four bolts. CLS-1385-35 requires adapter plate, CLS-1385-30, for use in a 15L reactor.Rebuild Kits for Agitator Assemblies:Kits of o-rings, seals and bearings to rebuild agitator assemblies.CLS-1380-05PM fits agitator assemblies: CLS-1380-05, CLS-1383-04, CLS-1385-35, Shaft Size 8mm.CLS-1385-05PM fits agitator assembly CLS-1385-05, Shaft Size 15mm.Like-for-like replacement parts for Applikon® Biotechnology and Broadley-James® brands of bioreactors.Applikon® is a registered trademark of Applikon Biotechnology, Inc. Broadley-James® and Broadley-James Corporation® are registered trademarks of Broadley-James Corporation.