339 Tube Sealed "PSAW" (Pipe Line Filters) with reduced ends, with sintered disc. 339/01 Disc Dia. 30 mm., Porosity Grade G 1 339/02 Disc Dia. 30 mm., Porosity Grade G 2 339/03 Disc Dia. 30 mm., Porosity Grade G 3 339/04 Disc Dia. 30 mm., Porosity Grade G 4 339/05 Disc Dia. 40 mm., Porosity Grade G 1 339/06 Disc Dia. 40 mm., Porosity Grade G 2 339/07 Disc Dia. 40 mm., Porosity Grade G 3 339/08 Disc Dia. 40 mm., Porosity Grade G 4 339/09 Disc Dia. 50 mm., Porosity Grade G 1 339/10 Disc Dia. 50 mm., Porosity Grade G 2 339/11 Disc Dia. 50 mm., Porosity Grade G 3 339/12 Disc Dia. 50 mm., Porosity Grade G 4 339/13 Disc Dia. 65 mm., Porosity Grade G 1 339/14 Disc Dia. 65 mm., Porosity Grade G 2 339/15 Disc Dia. 65 mm., Porosity Grade G 3 339/16 Disc Dia. 65 mm., Porosity Grade G 4 339/17 Disc Dia. 90 mm., Porosity Grade G 1 339/18 Disc Dia. 90 mm., Porosity Grade G 2 339/19 Disc Dia. 90 mm., Porosity Grade G 3 339/20 Disc Dia. 90 mm., Porosity Grade G 4