OP/TECH USA 1301442 Mirrorless Sling Strap Adaptor - System Connectors Converts most OP/TECH USA straps into an over-the-shoulder sling Attaches to pad (not included) with two quick disconnects Recommended weight load up to 2.5 lbs Fully adjustable length 28.5"39" (72,4cm99cm) Made in the USA