1002930 Barograph replacement blank arm, aluminium, undrilled, length 8" Generally for old barographs but will require drilling to suit. The ink used on barograph is corrosive and often attacks aluminium, so keeping the end clean prolongs the life of the arm. Later instruments introduced stainless steel arms for obvious reasons but most old barographs used aluminium as light weight, If the arm of your barograph has a wide end where the nib fits it may have been shortened over the years and could be in need of a new arm. Sorry, below our minimum order value of £18 + vat so you are unable to order on its own.
