O-Ring mounted wavespringseals with bi-elastomeric stationaries, to suit Top Lobe series lobe-rotor pumps.Shaft size:30mm,35mm,50mm SUIT IC? AND PD? -SERIES LOBE ROTOR PUMPS.Shaft size:30mm,35mm,50mm,70mm,80mm SH-RTP suit Johnson pumps, For technical information, pls contact us freely Harry Hao Chief of Export department Sino-Holding Co., Ltd Address: JingGuoli Zone 8-1-503, Jian Guo Men Wai Avenue, ChaoYang District, Beijing 100020,P.R.China. Tel: +86 10 5615 7697 Fax: 4008266163-04445 Mobile Phone: +86 135 2254 3686 E-mail: harry@sh-seals.com service@sh-seals.com Skype: sh_seals1 Web:www.shseals.com www.sh-seals.com