The rear sheath has a code ending in 036. It is made of rubber and used in conjunction with the front sheath. For AHR, LR, and MR type pumps, the flow-through components of the pump are made of rubber. The pump body, pump cover, and transmission components are interchangeable with those of AH, L, and M type pumps. It is suitable for conveying fine particles and corrosive slurry.