Isomass Isocheck 70mm deep acoustic/anti-vibration strap hangers without anchors allow decoupling of the ceiling and increasing the airspace beneath a timber or concrete separating floor. Where the floor to ceiling height allows, Isocheck Acoustic Hangers often provide the best performance when installed with an acoustic floor treatment. Isomass also produce a 35mm version, if you require that option please visit the contact us page to get in touch with us. Isomass offer a free acoustic detail design service to Building Materials Nationwide Ltd customers, please visit the contac t us page to get in touch.