This is an HO Scale STD Standard Steel New Haven Coach with a Rounded Roof. It's from Athearn for ages 7 and older.

Long coach car is black with a red stripe across the top sides.
New Haven and number 6300 painted in white on the sides.
NH logo also painted on the sides.
Unassembled parts to car include the undercarriage, trucks and wheels, plastic windows for the sides, and the metal weight planks.
Raised panel lines on the sides and roof.
Rounded roof has several side vents on its sides.
Doors on each end of car.
No cementing required, though weights do require screwing into undercarriage. Other parts snap into position.
Unassembled couplers and a brake wheel included.
Authentically scaled from railroad blueprints.
For HO scale track and equipment.

One HO STD Standard Steel New Haven Coach Car

Manufacturer:	Athearn
Product #:	ath2446
Your Price:	$8.99
List Price:	$11.75
Availability:	Discontinued - No Longer Available for Purchase

Scale: HO 1/87
Locomotive size -
Length: 10" (25.4cm)
Width: 1-1/4" (3.5cm)
Height: 2" (5.2cm)

Assembly
Small Flathead Screwdriver
Hobby Knife
HO Scale Train Track and Equipment
Adult Supervision

Keep out of reach of small children.
Add interior lights with #90201 lighting kit.