multifunctional u-shaped arm exerciser adjustable chest muscle exercise artifact home arm exerciser indoor wrist fitness equipment 多功能U型臂力器可调节锻炼胸肌神器家用臂力器室内腕力健身器材

blue normal spring will be deformed when used the red standard spring will deform with use. the gray standard spring will deform with use. blue upgraded kraft box red upgraded style kraft box gray upgraded kraft box blue upgraded color box red upgraded color box gray upgraded color box blue upgraded color box plastic seal red upgraded color box with plastic sealing gray upgraded version color box shrink-wrapped

30-50kg adjustable