Description Complete pole set to pitch a bell tent. The pole sets of the Deluxe, Ultimate, Pro and Protech bell tents are interchangeable. Sibley 300: Three-legged A-frame ( Ø 28 mm/ 1.10″) aside from the A-frame ( Ø 20 mm/ 0.79″) intended for the entrance Sibley 400: Central pole ( Ø 28 mm/ 1.10″ – 250 cm/ 8.20 ft long) with loop and an A-frame ( Ø 20 mm/ 0.79″) Sibley 450: Central pole ( Ø 28 mm/ 1.10″ – 273 cm/ 9.00 ft long) with loop and an A-frame ( Ø 20 mm/ 0.79″) Sibley 500: Central pole ( Ø 32 mm/ 1.26″ – 300 cm/ 9.84 ft long) with loop and an A-frame (Ø 20 mm/ 0.79″) Sibley 600 Twin: 2 central poles with a loop, a horizontal ridge pole ( Ø 32 mm/ 1.26″ – 300 cm/ 9.84 ft long) and 3 A-frames Sibley 600 DD: Central pole ( Ø 42 mm/ 1.65″ – 355 cm/ 11.65 ft long) with loop and 2 A-frames (Ø 20 mm/ 0.79″)