The eSUN eVacuum Kit Pro 3 is a vacuum-storage kit made for preserving 3D printer filament (and other consumables) that absorb moisture. It allows you to store filament in vacuum-sealed bags with desiccant so as to prevent water absorption, which can degrade print quality.

Features :

• Moisture Control
  It helps prevent moisture uptake by filament materials that are sensitive to water (e.g. PVA, ePA, ABSMAX, TPU-95A, etc.). 
• Vacuum Sealing
  The kit includes an electric pump that draws out air through a valve in the bag, creating a near-vacuum inside the bag. Double seals / improved valve design help with durability and sealing performance. 
• High-Quality Materials
  The bags are made from a composite of PA + PE, food-grade, FDA-approved, BPA-free. The materials are strong and recyclable. 
• Good Compatibility
  The bags are sized / shaped to accommodate typical filament spool sizes and filament diameters (1.75 mm, 2.85 mm, 3.0 mm) and spool weights (0.5 kg, 0.75 kg, 1 kg). 
• Portable / Compact Pump
  The electric pump is small, lightweight, which makes the kit fairly portable and usable at home. 

Specifications :

• Electric Pump
  • Size: approx. 32 × 32 × 102 mm
  • Weight: about 75 g (or ~ 113 g in some sources for pump only)
  • Material: ABS plastic
  • Suction / Air extraction: ≥ 4 L/min
• Vacuum Bags
  • Size: ~ 33 × 38 cm (or 33 × 40 cm in some sources)
  • Material: PE + PA composite, BPA-free and FDA certified
  • Thickness: ~0.085 mm to ~0.090 mm depending on region/source
  • Storage temperature: −20 °C to +85 °C
• Desiccant
  • Silica gel style; enough to help absorb moisture; color-change indicator in some cases (blue → pink) when saturated.
• Other
  • Sealing clips (to help seal the bag zippers before pumping)
  • Humidity indicator card / “humidity card” to see how dry inside the bag is.

Packing List :

• 1 Electric Pump (USB-powered) 
• ~10 Vacuum Bags 
• 2 Sealing Clips 
• ~15 Desiccant Bags / Packs 
• Sometimes a humidity card / indicator card depending on supplier. 

Usage Tips :

• Put the filament spool(s), the desiccant, and humidity indicator (if included) into one of the vacuum bags. 
• Squeeze out as much air manually as possible, then seal the bag temporarily using a sealing clip. 
• Place the pump’s nozzle over the bag’s air valve, ensure good contact, then turn on the pump to extract air. 
• Once the air is evacuated, press the valve flat (seal)/ensure the closure is properly sealed.
• Store the sealed bag in a dry, cool place. Avoid exposure to sunlight, moisture, etc.
• The vacuum does reduce air / humidity but might not reach a perfect vacuum, so very high humidity or very hygroscopic filament may still need extra drying.
• The sealing zipper + clip + valve all must be properly closed / aligned; if any part leaks, moisture can still get in.
• Over time, the desiccant will saturate and may need replacement. Watch the color-change indicator (if available).
• Bags have a limited lifespan; repeated folding, puncturing, or incorrect handling (e.g. sharp edges, sunlight) may degrade them.

Applications :

• Filaments that absorb moisture quickly: PVA, Nylon (PA, etc.), ePA-CF, ePA-GF, TPU-95A, etc. 
• Any filament you don’t use immediately after opening.
• Printing in environments with high ambient humidity.