COLLECTOR SET FOR 45K31 A/B/C FILTERS – BRAND GRAVER STRAINER PARTILOK TYPE M THE SET SHOULD CONTAIN: 01 STRAINER WITH HOLE IN THE TOP (MATERIAL: CYCOLAK) 01 T-SCREW 02 HEXAGON NUTS 1/2 X 13MM 01 POSITIONER 01 2MM JOINT (THICKNESS) 67MMX97MM GRAVER SUPPLIER REFERENCE DRAWING IS ATTACHED