3-part rung stepladder and extension ladder, insulating up to 1000 V AC/1500 V DC. Combined three-part rung ladder that can be used both as a stepladder and as an extension ladder (leaning ladder). When used as a stepladder, the third upper part of the ladder only serves as a safety bridge. Optimum stability thanks to the floor crossbar, extension ladder height adjustable from rung to rung by hand, 2 wall rollers at the top of the ladder, locking and opening mechanism made of aluminum, high-strength tensioning belts to prevent the stepladder from opening accidentally, hollow GRP stiles in H-profile (90x32 mm, with 8 rungs 70x32 mm), aluminum rungs with the dimensions: rung cross-section 27x27 mm, rung spacing 280 mm, tested in accordance with EN 131 (except 3x14 rungs!). Number of rungs: 3x10, stepladder height: 2.90 m, extension ladder height (max.): 7.45, weight: 32 kg. Plastic ladder with tested, extremely age-resistant fiberglass stiles that have an electrically insulating effect, especially for professional users who work near cables, connections or other live equipment. Light and handy thanks to the special design of the GRP stiles (hollow or C-profile) and aluminum rungs and steps, rungs and steps permanently double-flanged to the stiles, rung spacing 280 mm: load capacity 150 kg, non-slip stand thanks to rubber ladder shoes, including detailed operating, assembly and safety instructions. Ladders comply with European standard EN 131 and electrical tests according to DIN 53 481, 53 482 and 53 483 by independent testing institute CESI, 5-year durability guarantee.