The 485-67 is a replacement chamber assembly (with spacer, nut, and washer) designed for use in the HAKKO 485 rework / soldering system.  In the 485 rework station, the “chamber” is part of the solder pot / heating assembly that contains molten solder and helps maintain the correct geometry and sealing of the solder bath. The chamber ensures proper heat retention, alignment, and structural support. 

• Replacement chamber with spacer, nut, and washer
• Genuine Hakko replacement, it ensures dimensional and material conformity, which is crucial for correct sealing, heat transfer, and alignment in the rework system
• Non-returnable / limited availability: According to Hakko’s own listing, 485-67 is marked “No Cancellation / Non-Returnable”, likely due to its custom, high-precision nature