tender for set of pressure regulator assembly. aal part no.- 4300007100/55. each set consisting of followingspares:- (1) pressure regulator with filter (festo) part no- 4300067500-qty-01 nos. (2) sealing ring part no-4300067200/02- qty- 02 nos.(3) o-ring part no-4306057577/04- qty-02 nos.(4) spring lock washer m4 part no.-nb335805p0507 qty-04 nos. for aal make vcb.