ADJUSTABLE U JACK (STIRRUP HEAD) Fabricated out of 32.00, 36.00 & 38.00 mm and MS Bar with 4 TPI Acme / Square threads. U Head having requisite height fabricated out 100 x 6 mm MS Flat & Malleable cast iron Cup Type, Double Handle light / Heavy duty nut. Sizes available are 350, 450, 550, 600 mm bar length.