chain
M22-3-7.12-D5.07-18-PA is a part of the Roztocze chain, which is an industrial double-strand roller chain. It has a pitch of 7.12 mm, an inner width of 5.07 mm, and 18 teeth. The "M22" designation indicates that it is a metric chain, with a tensile strength rating of 22 kN, while the "PA" designation indicates that it is made of steel.