Do these pieces snap together to make one long track?

You can join these sections to each other or any other Code 83 track. Please note that rail-joiners have to be purchased separately with flex track. Also, when bending this track into any curve, you will need to cut one of the rails to the correct length.

Will this track work with some track I have already on hand. It is AHM brand it looks like it's brass. Can I mix and match brands?

You can mix and match brands, but not code (height of the rail in 1/1000's of an inch). I'm guessing the AHM track is Code 100. This track is Code 83. Item number 150-178 is the code 100 equivalent.

Atlas - Code 83 Flex-Track - 36" Long -- 5 Pack - HO - 0501

Name: Atlas Code 83 Flex-Track - 36" Long -- 5 Pack - HO - 0501
Brand: Atlas
SKU: 150-501
Price: 29.42 USD
Availability: InStock

Item Number: 150-501

MSRP: ~~$43.95~~

You Save: 33%

Your Price: $29.42

Click to see Free Shipping Offers!

Worth up to $1.47 in reward points!

Scale: HO

Brown railroad ties and nickel silver rail. Five 3' (36") sections.

Rail-joiners not included.

Additional Product Information

Manufacturer/Brand: Atlas
Mfg Part #: 0501
Choking Hazard - May contain small parts. Not for children under 3 yrs.
Model railroad items are not intended for unsupervised children under 14 years of age.
UPC: 843069194200