Here are specifications for the Young Chang G-157:
Length: 5’2″” (157 cm)
Width: 4’10″” (147 cm)
Height: 3’4″” (102 cm)
Weight: 551 lbs (250 kg)
Number of keys: 88
Key surfaces: Ebony
Pedals: Soft, sostenuto, and sustain pedals
Soundboard material: Solid spruce
Ribs: 10
Pinblock material: Hard rock maple
Frame material: Hardwood
Tuning system: Equal temperament
Number of strings: 225
Hammer type: High-quality hammers with T-wired strings
Action: Direct blow action with all-wood construction”