Reduces debris and maintenance; improving accuracy. Adjustable to fit Spectrum's rain collecter at 8" diameter. Stainless steel spikes to prevent corrosion. Does not interfere with Rain Collector. Durable and resistant to drastic weather/temperature changes. It is compatable with 3665RD, 3665R, 3525R, 3554WD1, 3350WD2, 3340WD2, 3684WDPD, 3684PD1, 3900ET, 3900WS, 3900PD, 3905ET, 3905WS, 3905PD, 3930ET, 3930WS, 3930PD, 3930ETAU, 3930WSAU, 3930PD