Get the ultimate secure and organized storage solution with Guardian #11 Key Drop Envelopes Pack of 500. These printed drop off envelopes are designed to accommodate car keys, fobs, money, and other small items your clients may leave after hours in lock boxes or door slots. Measuring 4-1/2" x 10-3/8", they also fit any paper documents. They are a larger size than the #10 envelopes, giving a little more space for customer small items, keys, and paperwork as well as giving extra room to the customer to write all repairs and services. Plus, they're crafted with high-quality materials and designed to last. The self seal flap envelopes ensure your customer's valuables are securely sealed and protected while in the key drop box. Whether you're a business owner of an auto body or repair shop, garage, or car dealership, or just providing an auto service, these envelopes are an automotive office supply essential. In addition to their functional design, these packets are versatile and can also serve as holders for other miscellaneous items. Proudly made in the USA, our envelopes, gift cards, business cards, and envelope seals contribute to positive impacts all over. Simplify your storage needs and experience the peace of mind that comes with security and organization!