Bowser Manufacturing Co.
6-Bay Cylindrical Covered Hopper

Norfolk & Western (light gray)
Walthers Part # 6-37290, p. 72 Walthers 2012 N&Z Scale Reference
N scale, $12.95, not currently in stock at Walthers, Expected: Unknown

 
Cars are gray with appropriate graphics unless noted and come equipped with standard N (Rapido-type) couplers.