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The small ones with duct. 
  • Extremely short design
  • Maintains counterpressure up to 1 bar (14.5 psi)
  • Very high expansion
  • Valve extension for better handling
Vetter's mini test sealing bags are the right choice for the inspection, maintenance or cleaning of pipes or ducts as well as for leak tests. The bags with 2.5 bar (36.25 psi) are great for testing, sealing, bypassing and diverting profiles up to 300 mm (12 inch).
Product number: 1492001100
Videos "Mini Test Sealing Plugs"
Product number: 1492001100
Air requirement [l]: 8.0 litre / 0.28 cu. ft.
Bypass: 1/2''
Pipe diameter : 100–150 mm / 3.9–5.9 Inch
Total length: 200 mm / 7.9 Inch
Weight: 0.60 kg / 1.32 lb
Diameter : 85 mm / 3.3 Inch

Notes:

* including valve connection