We are considering an alternative for [part / drawing number and revision] because the specified [manufacturer / full grade / color] cannot be sourced. The candidate is [full grade and color / undecided]. Assuming use of the existing mold, please show differences from the original, datasheet test methods, temperatures, dry/conditioned states and unanswered properties. Service conditions are [temperature / load / exposure]; required dimensions and functions are [locations / conditions]. Separate your recommended drying/molding conditions, adjustment or mold-change needs, proposed evaluation conditions and trial quantity, and cost scope. Applicable flame-performance or other requirements are [requirements / none / unconfirmed]. Identify untested items and quote supply conditions on the basis that production material will not be switched before our change approval.