Replacement silicone sock for the Phaetus Dragonfly BMS/BMO heater block. This black Phaetus sock insulates the hotend block, helps stabilize temperature, and keeps melted filament off the block during normal printing. Why use it Cleaner hotend maintenance: the non-stick silicone cover helps keep plastic buildup off the heater block. More stable heat: insulating the block reduces heat loss and helps the hotend hold temperature more consistently. Drop-in spare: shaped for Phaetus Dragonfly BMS and BMO heater blocks. Specifications Brand: Phaetus MPN: PH-3035-01A-00-0 Material: high-temperature silicone Color: black Maximum listed sock temperature: 280°C Fitment: Phaetus Dragonfly BMS and Phaetus Dragonfly BMO hotends Fitment notes Use this for the standard Dragonfly BMS/BMO block shape. For higher-temperature Dragonfly service, see the Phaetus Dragonfly High Temperature Sock. Not for Phaetus Dragon, Rapido, or other hotend block shapes.