4 pack guide wheels and 2 pack pulley gears, Part#3884997-R6. Fits for Dolphin Pool Cleaner. If the old gears on your for Dolphin robot start to break and wear out, or the parts that fail while crawling are pulleys and these, then you will need to replace this part of the parts, once you put on new guide pulleys and pulleys Gear and climb walls like new again. Keep your Dolphin pool cleaner in its best condition. The essential accessories of the pool cleaning machine are made of high-quality materials, which are not easy to damage and have a long service life to keep your swimming pool safe and operating normally. After replacing the accessories, that the for dolphin pool cleaning machine runs funny. Colour:White Material:POM+stainless steel Package Contents: 4 * Guide Wheels 2 * Pully Gears Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.