... connection, easy on-line replacement, uniform & tight sealing effect, aspiratory rubber sealing ring, prolonged service life.** Unique taper pin, US ... , tight for long service,good exchangeability.** Excellent sealing effect, leakage free even under ±1 degree offset ... pinLarge contact area, tight for long serviceGood exchangeability** Excellent sealing effect** complies with BS 6755, part1, 1986. ...