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Jumbo MK3 MouldSKU: JJJBA.OB
9 Inch Block Open Bottom Jumbo MK3 Mould MK3 Mould
The JJJBA.OB is a heavy-duty interchangeable mould unit designed for the Doubell Jumbo MK3 brick making machine. It produces 9 Inch Block Open Bottom bricks with industrial-grade efficiency and consistency.
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Cavity Block
9 Inch Block Open Bottom
Model: BA.OB
9 Inch Imperial Block (Twin Cavity) with Open Bottom. Designed to allow for vertical reinforcement (rebar) and concrete filling through the cavities.
Dimensions
- L: 440 mm
- W: 220 mm
- H: 220 mm
Family
BA
Compatible Machine

MK3 Range
Doubell Jumbo MK3 Manual "egg-layer" Brick Machine (Mould not included)
Doubell Jumbo MK3 Manual "egg-layer" Brick Machine (Mould not included)
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Est. Volume
0.01041 m³
Est. Mass
20.82 kg
Cost Per Brick (ZAR)
8.98
Cement: ZAR 4.58
Sand: ZAR 3.26
Stone: ZAR 0.89
Labor: ZAR 0.25
Production Forecasting
DIY Hand Mould
DIYBA.OB
500
(1 min cycles @ 100% efficiency)
1
500
Bricks / Day
Jumbo MK2
JJM + JJBA.OB
500
(1 min cycles @ 100% efficiency)
2
1000
Bricks / Day
Jumbo MK3
JJJM + JJJBA.OB
500
(1 min cycles @ 100% efficiency)
4
2000
Bricks / Day