Check the listing for details. 2 PACK FOR Pentair Rainbow 320 322 Chlorinator Spring Tube Support RPL R171097 W. Condition: New. Listed at 9.79 USD. Description: prevent the chlorination pipe from knotting, effectively limiting the water flow to the chlorine sheet. Chlorinator parts R171097 compatible with Pentair rainbow automatic chlorine/bromine pool and spa feeder models 320 & 322. R171097 Tube support spring and R172091 5/8" OD tube exact fit, metal spring wrapped around length of short black tube. Please note: 1. This is an aftermarket part, not an OEM one. Please make sure it will fit your machine before placing order(s). 2. If you are not sure whether the part will fit your machine or not, please message us and let us know your engine model, machine model, we will help. More information, more helpful. 3. If buyer orders wrong item, buyer will be responsible for return and exchange postage.