Our medium gray colored Concrete Donut - is 6.6 inches in total diameter across the bottom, inside diameter is  3.2  inches. Height is 1.5 inches.

These donuts are intended for standard lawn pop-up rotor heads (see itemized list below).

Our medium gray colored concrete sprinkler head donuts are manufactured to fit medium-sized pop-up lawn rotor heads such as the Hunter PGP Rotor Series, Hunter SRM Series, Hunter I-20 and I-20 Ultra Series, Irritrol CR-500 Series, Rainbird T-Bird Series, Rainbird 3500 Series,  Rainbird 5000 Series, Rainbird 5000 Plus Series and the Toro Super 600 Series, Super 700 Series, Super 800 Series and the Toro V-1550 Series,  and will also fit most brands of traditional  pop-up lawn rotor heads having an outside maximum diameter of 3 inches or less. If your sprinkler head measure more than 3 inches in diameter, these medium donuts will NOT fit.  

Note - the medium donut will NOT fit the Rainbird R-50 or similar sized larger (3.75 inch diameter) pop-up rotor heads. Please check head diameter before you order. Note - the medium donut is now the largest donut we carry. Concrete donuts are superior to the plastic variety because concrete donuts don't float away when it rains.

Note - Keep in mind when ordering sprinkler donuts, they are concrete, add substantially to your shipping charges, require intensive packing, and although they are made of concrete and are shipped in foam peanut packing and are seldom reported as damaged, we cannot and will not guarantee against head damage or donut breakage, before or after delivery or installation.

ALL CONCRETE DONUTS ARE SHIPPED BY UPS GROUND - ONLY.

Note - the two donut sizes we list here - small and medium - are the ONLY donuts we sell. We frequently get requests for larger sizes, but to our knowledge the larger size donuts are no longer being manufactured and we do not know of anywhere to procure them.