The weight of the bridge clip for violin is 0.025g and for cello is 0.05g. HERE IS A BRIDGE PROTECTOR/CAP. PLACED UNDERNEATH YOUR 'E' STRING ON YOUR VIOLIN, THIS WILL PROTECT YOUR BRIDGE, MAKING IT LAST LONGER, STOPPING THE STRING CUTTING IN, COULD ALSO INCREASE A BETTER TONE AND PREVENT BUZZING.
eBay