Roller sticks and tray optional for egg incubator Rcom 20 part no. H20-AF234-10 a total of 10 rollers and a set of robber rings. The rollers are adjustable to any eggs size for better egg rolling for all Rcom 20 series incubator. This is an optional item Number H20-AF234-10. Customers who incubate parrot eggs are telling us that they find the Rollers as the best suited as they provide gentlest egg rolling. Additionally, customers who incubate parrot eggs tells us that the px series are best suited egg incubators like PX20, ux20, PX 50 or ux50 as the machines give them the most control on egg turning for the angel and frequency. No shipping fee if ordered at the time of ordering the incubator.