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Property, Plant, and Equipment
 12 Months Ended
Dec. 31, 2020
Property, Plant, and Equipment  
Property, Plant, and Equipment
6. Property, Plant, and Equipment
 
 
Property, plant, and equipment consisted of the following at December
 
31:
2020
2019
Land and land improvements
$
6,009,000
$
6,009,000
Buildings
43,545,000
43,375,000
Machinery and equipment
121,382,000
118,366,000
Tools, dies, and patterns
2,195,000
1,516,000
Additions in progress
1,422,000
1,615,000
Total
174,553,000
170,881,000
Less accumulated depreciation
(100,501,000)
(91,675,000)
Property, plant and equipment,
 
net
$
74,052,000
$
79,206,000
Additions in progress
 
at December
 
31, 2020 and
 
2019 relate to
 
building improvements and
 
equipment purchases that
 
were not
yet completed and placed in service at year end.
 
At December
 
31, 2020, commitments for capital expenditures in progress were
$
677,000
 
and included $
145,000
 
recorded on the
 
balance sheet in accounts
 
payable.
 
At December
 
31, 2019, commitments
 
for
capital expenditures
 
in progress
 
were $
336,000
, and
 
included $
158,000
 
recorded on
 
the balance
 
sheet in
 
accounts payable.
 
Depreciation expense
 
was $
8,659,000
, $
8,187,000
 
and $
7,361,000
 
for the
 
years ended
 
December
 
31, 2020,
 
2019 and
 
2018,
respectively.