tender for purchase for 8 ft x 16 ft and 10 ft x 20 ft vacuum filter drum spares , a) 10’ x 20’ filter drum brass zig-zag 2’ long , ss screw , ss pipe line complete set, grade 304 size- ½” x ¾” , brass solid strip 12’ long , brass divisional strip 8’ long , ss bending strip , copper rivet 5/8” x15 mm , araldite , soft lead , m-seal , b) for 8’ x 16 vacuum filter drum brass zig-zag 2’ long , ss screw , ss pipe line complete set, grade 304 size- ½” x ¾” , brass solid strip 12’ long , brass divisional strip 8’ long , ss bending strip , copper rivet 5/8” x15 mm , araldite , soft lead , m-seal , ss drum nipple , ss junction box five way grade 304