The Nagaoka AD-653/2 Adaptor / Spacer for your 45 RPM records weighs in at 21 grams.
This precision machined aluminum adaptor, made in Japan, is sure to stay in place when you are lifting up your 45's. No more will you have to deal with your lightweight adapter flopping around when you remove your 45RPM record.
Every Serious Audiophile & / 7" Record Collector has to have an AD-653/2
MADE IN JAPAN, Milled with Strict Precision from an Aircraft Aluminum Billet