Check the listing for details. MSA 815448 Advantage 200LS Respirator Single Neck Strap Size SMALL. Condition: New, Made in United States. Listed at 10.99 USD. The MSA 815448 Advantage 200LS Respirator is a high-quality personal protective equipment designed to provide a secure and comfortable fit. With a single neck strap size small, this respirator is ideal for businesses and industrial settings where respiratory protection is needed. The MSA brand is known for its reliability and durability, making this respirator a trusted choice for those looking to ensure their safety on the job.