Convenient to operate. Material: Wooden stepStep number: 10-182Length: 3.3-60m Certificate: EC,ABS, BV, CCS, DNV, GL, KR, NK, LR, RINA.Package: coil, hank or customizedAdvantages: Light, Convenient to operate. Application: It is used to aboard the lifeboat by people in case of emergency. Also it can be used to go on board or ashore by crew.