NIGP 16040: Knockers and Stunners

I cannot write a summary for this request. The source provides only the NIGP code number (16040), its name (Knockers And Stunners), and the tier designation, but contains no description of what state and local governments actually buy under this code and no block of recent state and local contract opportunities to ground the analysis in real procurement activity.

To produce a usable summary, I would need the <most-recent-state-local-contract-opportunities> block populated with actual solicitation records — issuing bodies, notice types, response dates, and scope descriptions — and a meaningful NIGP class or item description. Without recent opportunities data, I cannot characterize the issuing-body mix, geographic spread, or representative work being solicited, and doing so would require me to invent facts that violate the output rules.

Please provide the opportunities block or confirm that this code currently shows no recent state and local procurement activity.