You can click on the Picture and it brings you to PowerWash.com. Price is a few bucks cheaper.

Details
Open Flow: 5.3 GPM
Pressure: 100 PSI
Liquid Temperature: 140°F (60°C) Max.
Delivery Type: Demand
Priming Capabilities: 14 feet (4 m)
Inlet/Outlet Ports: 1/2” NPT
Weight: All models: 8 lbs (3.62 kg)

This is the 5850


$152.00


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Product Description
Additional Information
Details
With an excellent self-priming capability and capable of being run dry, this Delavan PowerFLO Series 5850-101E Diaphragm Pump is a great choice. Features include:
Demand Switch - Operates only when liquid flow is required
Volts: 12 VDC
Motor: Permanent magnet, totally enclosed
Leads: 14 AWG, 12” Long
Pump Type: 5 Chamber positive displacement diaphragm
Max. Flow: 5.0 GPM
Pressure Shut-Off: 60 PSI
Amps: 6 – 16.3
Certifications: NSF standard 58
Liquid Temp.: 140° Maximum
Priming Capabilities: 14’
Inlet/Outlet Ports: 1/2” FNPT
Housing: Polypropylene
Viton Valves

I just don't like that pressure switch. That's why I left delevan. The switches can't take enough amps and a use to not go bad all the time. Shurflo uses a better design to their switch.