The RSIC-SI-FF 3/8″ BC and WC EZ is a full-frame spring and rubber isolator. This spring isolator can be attached by mid-wire to support the drywall grid below. The RSIC-SI-FF 3/8″ BC and WC EZ is one of the highest-performing rubber and spring isolators available for your noise control needs. The spring hanger uses a 3/8″ threaded rod and has 15 degrees of vertical alignment.