Image 1 of 1 Feeder cap for our ET8 and ZM8 lids $2.00 Quantity: Add To Cart Added! This is a feeder cap that fits our Tinkerframe ET-8 and ZM-8 lids. If you need one for a larger lid see the other feeder cap listing. This is a feeder cap that fits our Tinkerframe ET-8 and ZM-8 lids. If you need one for a larger lid see the other feeder cap listing.