【Bowl Lid Purpose】The seal bowl lid that is compatible with KitchenAid mixer Stainless Steel Bowl for secondary fermentation when the dough is finished,Use to completely cover the mixing bowl to prevent dust and keep your material safe before cooking/baking. 【Applicable Model】the seal bowl lid designed for KitchenAid Tilt-Head Stand Mixer bowl. Applicable 6/7QT bowl,Made of food grade plastic(Note: Only for installing stainless steel bowls) 【High-quality design】 Silicone leak-proof ring, which can effectively carry out negative pressure sealing, and the clamshell button type vent is convenient for air pressure sealing cover 【AFTER-SALES SERVICE】If you have any problems or quesions or not satisfied with our product,welcome to contact us,and we would give the solution within 24 hours.30 Day for a refund or replacement if any quality issue. the seal bowl lid designed for KitchenAid Tilt-Head Stand Mixer bowl. Applicable 6/7QT bowl,Made of food grade plastic(Note: Only for installing stainless steel bowls)