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Products & Services
About Keystone
This profile covers Keystone, a company reporting $1M-$5M in annual revenue, classified under Services to Buildings and Dwellings, based in Elfers, Florida, United States, operating in Office service and employing 11-20 people.
Its primary NAICS classification is 561720 (Janitorial Services). Keystone is one of 2,003,955 Industrial & mechanical companies listed in Florida.
Business Contact Information
- Phone
- +1 (813) 5632824
- Website
- keystonehbc.com
- Address
- PO Box 913, Elfers, Florida, 34680, United States
Industry & Classification
- Industry
- Industrial & mechanical
- Sector
- Commercial services
- Segment
- Office service
NAICS Codes
- 56Administrative and Support and Waste Management and Remediation Services
- 5617Services to Buildings and Dwellings
- 561720Janitorial Services
SIC Codes
- 45Transportation By Air
- 458Airports, Flying Fields, And Airport Terminal
- 4581Other Airport Operations
Company Details
- Employees
- 11 (11-20)
- Annual Revenue
- $1.8M ($1M-$5M)
Keystone: frequently asked questions
What does Keystone do?
This profile covers Keystone, a company reporting $1M-$5M in annual revenue, classified under Services to Buildings and Dwellings, based in Elfers, Florida, United States, operating in Office service and employing 11-20 people.
Where is Keystone located?
Keystone is headquartered at PO Box 913, Elfers, Florida, 34680, United States.
How many employees does Keystone have?
Keystone has about 11 employees (the 11-20 range).
What is Keystone's annual revenue?
Keystone's annual revenue is estimated at $1.8M (the $1M-$5M range).
What industry is Keystone in?
Keystone is in the Industrial & mechanical / Commercial services industry, and its primary NAICS code is 561720 (Janitorial Services).
How can I contact Keystone?
Its website is keystonehbc.com and its phone number is +1 (813) 5632824.
What companies are similar to Keystone?
Other large industrial & mechanical companies in Florida include Deloitte, PwC, State of Florida and Florida Department of Education.
Largest industrial & mechanical companies in Florida
Largest companies in Florida
Largest industrial & mechanical companies
Manufacturing sales in Florida, 2026
In Florida, Factur's 2026 study counted 54 manufacturing quotes worth $10.7M and 9 purchase orders over 12 months: 17% of quotes became orders, against 21% nationally. See the Florida data.
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