Dadant B.nest pocket feeder made of PP - polypropylene (one-piece molded without screws)With possibility of adding top cap with dual function:- Does NOT allow bees to enter to "build"- Turns the feeder into a diaphragm.Non-slip walls - Dimensions : 30 x 47.5 x Sp. 2.5 cm - Capacity 3 LitersOPTION:- Without top cap- with top cap