After countless requests, I’m finally offering a fully assembled, ready-to-install version of my 4" (100 mm) ball valve blast gate. This is the same design I run in my own workshop, now with an updated handle for smoother operation and better leverage.
 
Every unit is printed from durable PETG, assembled by hand, and tested to make sure it opens and closes cleanly. If you’ve wanted the convenience of a printed blast gate without the print time or assembly work, this is it.

Key Features 
 
Fully assembled, ready out of the box
No screws, bolts, or fiddling required. Just connect it to your dust collection line and you’re good to go.
Ball-valve style design 
Provides excellent airflow with minimal restriction compared to traditional sliding gates. Updated handle design.
Printed in PETG for workshop durability
Suitable for woodworking dust collection and general workshop extraction.
Designed to match standard 100 mm ducting
Output/input profiles match 100 mm ducting (100 mm OD, 96 mm ID). A coupler or flex hose is recommended for connection.
Built and finished by hand
Each gate is individually printed, assembled, and lightly finished. Minor cosmetic artefacts or light scratches may be present, nothing that affects performance.
Hobby use recommended
Ideal for home workshops or hobby setups (not intended as a certified commercial dust-extraction component).
Hard stops included
Custom hard stops are included, but not attached to the gate.  This is so you can choose whether to fit them, or omit them depending on your prefence, and which way you want the gate to open and close. The magnets to attach are included, but also not fitted to the stops.  This gives the option to choose which side or angle, you want your stops to opperate on.
 
Overall Dimensions:
Width: 160 mm
Length: 132.9 mm (including handle)
Height: 180 mm
 
Port Size:
Outer Diameter: 100 mm
Inner Diameter: 96 mm
 
Materials:
Casing: Black PETG-HF
Ball & Handle: Red PETG-HF
 
Available in single, double and four packs.