A comprehensive 145 piece kit containing 9 types of fibre and rubber washers suitable for heating engineers. Products marked are made with a WRAS Approved material and are suitable for use with potable water and Natural Gas. Kit comprises: Rubber Pump Washers (10) Fibre Pump Washers (10) 1 1/4" Fibre Washers (10) 1" Fibre Washers (15) 3/4" Fibre Washers (20) 1/2" Fibre Washers (20) 3/8" Fibre Washers (20) /4" Fibre Washers (20) 8x4x1.5mm Fibre Diff. Washers (20)