Bambu Lab Silicone Sock for Hotend — X1C

Bambu Lab Silicone Sock for Hotend — X1C (3-Pack)

The silicone sock is the small black cover that wraps your X1 Carbon's heater block — and it quietly does one of the most important jobs on the toolhead. It insulates the hotend from the part-cooling fan's airflow so the nozzle holds the temperature your slicer asked for, and it stops stray molten plastic welding itself to the block. Socks are a consumable: silicone ages, stretches and tears under months of high heat, and a cracked or loose sock means temperature swings, inconsistent extrusion and a messy hotend. This is the genuine Bambu Lab replacement part (FAH001-S-3), supplied as a three-pack so you have spares on the shelf before you need them.

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Key features

Genuine Bambu Lab part 3 socks per pack Rated to 300 °C Tear-resistant silicone rubber No tools required 5-minute swap

• Stable nozzle temperatures. The sock blocks cold air from the part-cooling fan hitting the heater block, so the hotend isn't constantly fighting to hold setpoint mid-print.
• Cleaner hotend. Filament oozes and blobs don't bond to a silicone surface the way they bond to bare metal — a sock takes the mess so the block doesn't.
• Protects wiping and levelling. A loose or torn sock can foul the X1C's nozzle-wipe and bed-levelling routines; a correctly fitted one keeps those behaving.
• Built for the heat. High-quality silicone rubber rated for printing temperatures up to 300 °C, which is exactly the X1C hotend's maximum.
• Spares on hand. Three per pack — fit one now, keep two in the toolbox for the next nozzle change.

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Who it's for

Any X1 Carbon owner, from first-printer hobbyists to schools and print farms. If your sock is cracked, discoloured, brittle, stretched or slipping off the block, it needs replacing — and if you swap nozzles or hotends regularly for different materials, a sock usually gets sacrificed each time. Classrooms and small production shops should keep a pack per machine; downtime from an unstable hotend costs far more than the spare.

Works with every filament your X1C does

The sock isn't material-specific — it protects the hotend across the X1C's full temperature range, so PLA, PETG, ABS, ASA, PC, PA and CF/GF-filled engineering filaments are all covered, up to the 300 °C hotend limit. It is especially worth fitting a fresh one before long high-temperature ABS/ASA/PC jobs, where the chamber is hot and temperature stability matters most.

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What's in the box

• 3 × Bambu Lab Silicone Sock for Hotend (OEM part FAH001-S-3)

That's it — no tools, screws, hotend or nozzle are included. The hotend, nozzle and hotend cooling fan are separate parts; this listing is the silicone sock only.

Fitting it (about five minutes)

1. Let the nozzle cool below 50 °C, then power the printer off.
2. Open the front housing assembly and hang it over the carbon rod.
3. Move the toolhead forward, then pull the old sock downwards to remove it.
4. Line up the wire notch on the new sock with the correct side and push it up over the nozzle to the top of the block.
5. Close the housing and check visually that the sock is seated tight with no gaps.

Procedure per Bambu Lab's X1 wiki — no tools needed, it's a hand-fit part.

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Specifications

OEM part number	FAH001-S-3
Pack quantity	3 × silicone socks
Material	Silicone rubber
Colour	Black
Max printing temperature	300 °C
Compatibility	Bambu Lab X1C (Bambu lists this part for the X1 Series and P1 Series hotend)
Tools required	None — removed and refitted by hand
Package size	60 × 60 × 30 mm
Gross weight	12 g
Brand	Bambu Lab (genuine OEM part)

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