Adjustable air vent Decorative classic bell shape. Captures maximum sunlight from all angles. Encourages fast & vigorous growth. Protects plants from birds and other pests. Safeguards against frost, wind and storms. Diverts rain and condensation into surrounding soil. Made from high quality recycled plastic. Durable and stackable. Can be pegged firmly through holes in base. Perfect for warming soil prior to sowing or planting, protecting seedlings, tender and semi hardy plants, overwintering of herbaceous border and less hardy perennials. Horticultural product award winner. Use for bringing on cuttings, seedlings or protecting alpines. Diameter 25cm 10\" Height 20cm 8\"