This Orbit WaterMaster Underground 57045 Diaphragm Replacement Kit is the perfect solution for replacing your old and worn out diaphragm. The kit includes everything you need to get the job done quickly and easily. The plastic material ensures durability and long-lasting use. The item model number is 57045, and it is compatible with Orbit Underground/Sunmate brand products. This kit is a must-have for anyone who wants to maintain their watering equipment and keep their garden thriving.  Box is a little crunched, but item is absolutely perfect & well-protected.