Top Croll L - PETZL The Croll L chest with its integrated ascender is compatible with the Astro Sit Fast, Avao Sit and Sit Fast, Falcon and Falcon Ascent, Sequoia SRT harnesses. It enables them to comply with the CE EN 361 standard. Croll L chest ascender providing effective support during rope ascents, compatible with ropes with a diameter of 8 to 13 mm. - Textile sternal point. - Y connection to the shorts. - Weight: 600g.