In an epoxy resin composition comprising an epoxy resin, a curing agent, an inorganic compound, and an inorganic filler, the inorganic compound is an oxide of metal elements at least one of which is a metal element of Group II in the Periodic Table having a second ionization potential of up to 20 eV, typically Zn2SiO4, ZnCrO4, ZnFeO4 or ZnMoO4. In one aspect of the disclosure, the threshold value may include multiple threshold values. The knife blade is coupled to the handle and has a first edge and a second edge. The filter 1 may be coated with a non-thrombogenic coating and an adhesion preventer 9 such as a silicon gel is used to substantially prevent adhesion of adjacent folds of the filter 1 when the filter is in the collapsed configuration in the delivery catheter 20. The timing module determines a survey time and if the panelist may perform another survey in a remaining time.