The Little Giant 513300 GR-1 1/4 Guide Rail System is an accessory that makes cleaning and maintenance quick and easy. It is recommended for use when inserting pumps in a collecting chamber. They are also suitable for installations of 5' over 5' deep with discharge pipe size of 18" or more. It is particularly suitable for installations where the liquid surface level is above the discharge level. This separate accessory provided by Little Giant lessens the time and cost of removing a pump. This Little Giant 513300 has a 1-1/4" IPS (Iron Pipe Size) and should be used for the 3" discharge system. It comes with set screws to make sure that the steel pipe is secured to the foot guide. It includes guide rail brackets and steel stand-off brackets for support on the upper end of the guide rail pipes. For this guide rail system, it is recommended to use stainless steel IPS pipe rails (supplied by the customer). It utilizes a red brass guide rail foot, assuring durability. It boasts its Teflon-coated Buna-N O-ring. More details are available in the specification sheet. The Little Giant GR-1 1/4 Guide Rail System is recognized for meeting the required environmental performance standards. Little Giant and its parent company, Franklin Electric, have been making pumps and accessories for over 70 years. The quality, durability and dependability of their products have made them a world leader in pumps of virtually every variety.