We can produce all kinds of marine ventilation pipes and accessories: branch, flexible connection, manual fire damper, grille, un-insulated/pre-insulated pipes, pre-insulated spiral elbows, nipples, reducers, sleeves, T-piece, branch, Deformed joint, penetration, suspension clamps, fire damper, hose carrier, sliding points, supporting points, air vent head, sounding head etc. Class certificate(ABS, DNV, GL,LRS, BV, NK, KR or CCS) certificate can be provided for above products according to your requirements. Should you have requirement for any of above products, please contact with us freely at: aiqinyao@126.com Best regards. Yao Aiqin(Mrs) Jingjiang Top Far International Trading Co.,Ltd Tel: 0086-523-84803500 Fax: 0086-523-84896996 Contact aiqinyao@126.com SKYPE: aiqinyao MSN: aiqinyaohope@hotmail.com Http://www.chinatopfar.com