45-degrees positioning is ideal for training posterior muscles Thigh pads are adjustable to fit all user sizes Lower leg pads support at the calf which eliminates knees discomfortBACK EXTENSIONSKU: SP-4220PRODUCT DIMENSION1422 x 820 x 830mm / 56” x 32” x 33” MAX LOADING CAPACITY280kg / 617lb PRODUCT WEIGHT51kg / 112lb CARTON DIMENSION CARTON A 1060 x 470 x 370mm / 42” x 19” x 15” CARTON B 670 x 180 x 340mm / 26” x 7” x 13”