Works with the Juwel cold frame and extension unit. Special jelly in black cylinder responds to inside temperatures to automatically open and close top panels without electricity. Adjustable to begin opening anywhere from 60F to 85F. Raises up to 12 lbs. Full opening is 17".
Juwel 1000 Basic Unit-New "Easy Fix" Model Greenhouse-quality solid aluminum frame from Austria. Polycarbonate, shatterproof, twin-skin glazing throughout. Top and 4 walls are all glazed for high light levels. Top opens in front or back, or lifts off completely. 39" long x 34" front to back. Front 12" tall, Back 15-3/4".
