Clover Tool BOP Test Unit Clover Tool Co. 20,000 PSI BOP Test Unit ( CTU-20P-D1-4B ) available for sale Clover Tool BOP Testing Unit Clover Tool Co. 20,000 PSI BOP Test Unit ( CTU-20P-D1-4B ) available for sale. Please contact for price. Please contact for further details & price. Contact Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on WhatsApp (Opens in new window)Click to email this to a friend (Opens in new window)