PMC HI-05021 Heater Block Thermocouple. A replacement component for PMC proportioning equipment. Designed to support reliable spray performance and proper temperatures, and reduced downtime during spray foam insulation applications. SPF Depot stocks OEM and aftermarket PMC parts including side seals, mix chambers, O-ring kits, rebuild components, filters, and maintenance items for AP2, PX7, and Xtreme spray foam guns. Fast shipping available on many in-stock PMC replacement parts.